A few examples of appraisal values for
QUADRANTS

• 18TH CENTURY ARABIC QUADRANT FROM
  18TH CENTURY ARABIC QUADRANT FROM THE MAGHREB REGION OF NORTHWEST AFRICA CIRCA 1776 HEIGHT 7.5". WIDTH OF ARC 10.25".18TH CENTURY ARABIC QUADRANT FROM THE MAGHREB REGION OF NORTHWEST AFRICA, Circa 1776, Signed in Arabic along one of the sight vanes "Made by the little slave of his Lord, Ahmad b'Ali Marsil, year one thousand one hundred and ninety" (1190 A.H., equivalent to 1776-77 A.D.). One side of the brass plate with an engraved astrolabe quadrant with data for 35 degrees north latitude. This line of latitude runs through the Maghreb Region in Northwest Africa, which comprises current-day Morocco, Algeria and Tunisia. One of the radial edges has been cut with a long indentation to provide two "sight" vanes, and a plumb bob is attached by a string to the apex. There is also a horary quadrant for unequal hours marked at the apex. Extensive astronomical and mathematical plots are engraved on the surface including a stereographic projection of the sky with astrological symbols, various star positions and the elliptic and azimuth lines. These plots enable the quadrant's use as a computer to find rising and setting times and positions of the sun, the constellations and bright stars, as well as the time of day or night, and other solutions for problems in practical astronomy. Reverse with a sine quadrant, which has been covered by a reinforcing board and back plate with a roundel inscribed "From the work of as-sayyid Ahmad b, Ali Marsil, may God have mercy". This suggests the modification was made by the original maker. At the bottom, the quadrant has an index of 0-90 for taking sights. The quadrant sight used gravity to align the plumb bob with the index reading when the celestial body was observed by eye over the top of the instrument along the sighting vanes. The string was then clamped by the observer's finger against the index, and the angle read. Dimensions: Height 7.5". Width of arc 10.25". Provenance: Sotheby's, London, The Frank Collection of Scientific Instruments, 1986.The Kelton Collection of Marine Art & Artifacts.Notes:Since no horizon need be visually sighted (like with the later bubble sextant), this instrument could be used for star sights at night and on land where the horizon was not observable. The reading did not have to be compensated for the altitude of the observer -- the calculation of which was very controversial. The cast shadow method was used to measure the sun's altitude. The basic design of the instrument is of ancient origin. A graduated circle was the earliest instrument for measuring the altitudes of heavenly bodies precisely. It was Ptolemy who first suggested the measurement could be made with a quarter circle or quadrant. The quadrant reproduces data from the entire sky. It is conceptually formed by taking the circle of the sky with all required data, folding it on the East-West line, then folding the resulting semi-circle on the North-South line. Thus the four quadrants of the full circle, with their data, are superimposed over one another. In use it is necessary to select the curves and data appropriate to the quadrant addressed. As a maritime instrument, the quadrant could have been in use by Arab navigators in the Indian Ocean centuries before the Portuguese arrived, although at sea, stabilizing the plumb bob on a rolling deck was a problem in obtaining an accurate sight.The 35 degrees north latitude seems to be the most central latitude bisecting the Islamic world. It passes through Morocco, Algeria, Tunisia, along the southern Mediterranean through Crete and Cyprus, then into Syria, Iraq, Iran, Afghanistan, Pakistan and Northern India before extending on into China and points east. Although the latitude information constrains the use of the quadrant as an astronomical computer to the latitude for which the data is inscribed, it can be used anywhere in the world for measuring the altitude of the sun, moon and stars, the primary measurement required to determine one's latitude. The 90 degree scale inscribed at the bottom is for this function.
• "HADLEY'S QUADRANT," UNKNOWN
  "HADLEY'S QUADRANT," UNKNOWN ENGLISH MAKER 2nd half 18th century: actually, an octant, type used by British and American navigators during the Revolutionary War period; ebony frame with engraved brass mounts; 17 1/4 in. H.
• EARLY MARINER'S QUADRANT BRITAIN,
  EARLY MARINER'S QUADRANT BRITAIN, CIRCA 1780 LENGTH OF RADIUS ARM 18". WIDTH OF SCALES 14.5".EARLY MARINER'S QUADRANT, Britain, Circa 1780, Unsigned. Ebony "T" frame with inset ivory scale calibrated from -2 to 99 and divided in 20 arc minute increments. Brass 18" flat index arm with ivory vernier reading from right to left "0 5 10 15 20", providing a reading with an accuracy of one arc minute. Index arm with a single thumb screw stop, of the type which predates the tangent screw fine adjustment feature introduced in the Late 18th Century. Additionally includes an ivory name plate (blank), an ivory-bound pencil, a peephole sight, three colored filters, mirrors, brass feet and other details. Lacking box. Dimensions: Length of radius arm 18". Width of scales 14.5". Provenance: West Sea Company, Old Town San Diego, 2012.The Kelton Collection of Marine Art & Artifacts.Notes:This early double reflecting navigation instrument has a large index mirror and two horizon mirrors. The lower of the two mirrors is for the antiquated back sight feature with a single peep sight. The upper mirror is for standard sighting using a double peep. For taking sun lines the original set of three colored glass filters is present. It is interchangeable for use with either sight. Remarkably, this quadrant is complete with its original, rarely found ivory-bound pencil for recording observations. Interestingly, some old notations are still present on the vertical limb just below the blank ivory nameplate in the center of the instrument. More typically, such observations would have been recorded on the inlaid ivory notepad on the reverse side. The reverse is also complete with its original brass "feet".
• TWO 19TH CENTURY QUADRANTS TO
  TWO 19TH CENTURY QUADRANTS TO INCLUDE ONE MADE OFEXOTIC WOOD, MAKER'S PLATE MISSING, PURCHASED FROM RICHARD BOURNE'S AUCTION IN 1988, 17" X 14 1/2". THE OTHER UNMARKED, WOOD WITH BRASS TRIM, FAIR CONDITION, MINOR DAMAGE TO WOODEN DIAL, 18" X 15".
• QUADRANT LONDON, 18TH/EARLY 19TH
  QUADRANT LONDON, 18TH/EARLY 19TH CENTURY LENGTH 20”. WIDTH 17”.QUADRANT, London, 18th/Early 19th Century, Rosewood frame. Marked "G. Adams Fleet Street, London". Dimensions: Length 20". Width 17".
• QUADRANT BY E. & G.W. BLUNT IN A
  QUADRANT BY E. & G.W. BLUNT IN A DECORATED CASE 19TH CENTURY CASE 13.5” X 16.25”.QUADRANT BY E. & G.W. BLUNT IN A DECORATED CASE, 19th Century, Wedge-shaped case with a portrait of George Washington, roses, an American flag, eagle and "C.C. Blanchard" banner. Retains label for retailer E. Medinger. Dimensions: Case 13.5" x 16.25". Provenance: The Collection of Chuck and Jan Deluca.
• HADLEY'S QUADRANT CIRCA 1810 BOX
  HADLEY'S QUADRANT CIRCA 1810 BOX 12.5" X 12.25" X 4.25".HADLEY'S QUADRANT, Circa 1810, Unsigned. Ebony "T" frame with brass 12-inch index arm, the 10-inch ivory index scale expanded to 100 degrees, incorporating the (new feature) of a tangent screw for fine adjustment of the index arm. The owner's plate inscribed "Julius F. Schierbeck Kjobenhavn". Dimensions: Box 12.5" x 12.25" x 4.25". Provenance: The West Sea Company, Old Town, San Diego, California, 1986.Purchased from the above by The Kelton Collection of Marine Art & Artifacts.
• HADLEY'S QUADRANT BY RICHARD
  HADLEY'S QUADRANT BY RICHARD ROWLAND BRITAIN, CIRCA 1780 LENGTH OF RADIUS ARM 18". WIDTH OF SCALE 14.75".HADLEY'S QUADRANT BY RICHARD ROWLAND, Britain, Circa 1780, Signed on the brass index arm "Richard Rowland" (Britain, 1761-1840). Ebony "T" frame with inset ivory scale calibrated from 0 to 95, and divided in 5 arc minute increments. Long flat brass index arm with ivory vernier and a single thumb screw stop, the type which predates the tangent screw fine adjustment feature introduced in the Late 18th Century. Additionally includes an ivory name plate (blank), dual peephole sight, mirrors, brass feet and other details. Lacking box. Dimensions: Length of radius arm 18". Width of scale 14.75". Provenance: Christie's South Kensington, London, 1985.The Kelton Collection of Marine Art & Artifacts.
• 18TH CENTURY EBONY QUADRANT CIRCA
  18TH CENTURY EBONY QUADRANT CIRCA 1781 LENGTH 15.75". WIDTH 13".18TH CENTURY EBONY QUADRANT, Circa 1781, Unsigned. Ebony frame with reverse sight and inset ivory scales to 100 degrees. Inscribed "John Holdsworth 1791", probably the original owner. Dimensions: Length 15.75". Width 13". Provenance: West Sea Company, Old Towne, San Diego.The Kelton Collection of Marine Art & Artifacts.
• RARE HADLEY'S QUADRANT BY JOHN
  RARE HADLEY'S QUADRANT BY JOHN URINGS II BRITAIN, 18TH CENTURY LENGTH 19.25". WIDTH OF ARC 16".RARE HADLEY'S QUADRANT BY JOHN URINGS II, Britain, 18th Century, Signed on the inset ivory plaque on the cross-bar "{...] Urings Fecit London". Mahogany "T-frame" and radius arm with clamp. Index with a 90-degree arc; diagonal scale for dividing the increments on the index scale. Mounted brass peep hole sight, mirrors and filters. Lacking box. Dimensions: Length 19.25". Width of arc 16". Provenance: Sotheby's, London, Frank Collection of Scientific Instruments, 1986.The Kelton Collection of Marine Art & Artifacts.Notes:This very early quadrant, made shortly after Hadley's patent expired in 1747, exhibits features common to most early examples. First is its large size, which enabled the index arc to be engraved and read more accurately, before the use of ivory or metal arcs that allowed for finer calibration. Second is its two sighting locations, one on either arm. This instrument has only a 90-degree arc on the index. Third is the use of the diagonal scale for dividing the increments on the index scale. Though theoretically very accurate, the index was difficult to read in practice. Fourth is that it is mostly a wooden instrument. Finally, it uses peep holes, not telescopes, which were expensive at the time.John Urings (1738-c.1773) is known to have made a variety of different kinds of instruments. Other known examples include a 1752 Davis backstaff and a 1763 octant, as well as both telescopes and microscopes.
• QUADRANT BY BENNETT OF LIVERPOOL
  QUADRANT BY BENNETT OF LIVERPOOL WITH DECORATED CASE 19TH CENTURY CASE 14.25” X 12.5”.QUADRANT BY BENNETT OF LIVERPOOL WITH DECORATED CASE, 19th Century, Stepped wedge-shaped case with an eagle and flag on upper tier and a three-masted ship on lower tier. Bears paper label for William DeSilva. Dimensions: Case 14.25" x 12.5". Provenance: The Collection of Chuck and Jan Deluca.
• 25 ASSORTED QUARTERS25 assorted
  25 ASSORTED QUARTERS25 assorted quarters
• CASED QUADRANT 19TH CENTURY CASE
  CASED QUADRANT 19TH CENTURY CASE HEIGHT 5". LENGTH 12.5".CASED QUADRANT, 19th Century, Ebonized wood frame with inset ivory 0-110 degree scale. Brass index arm, sights, etc. In a wedge-shaped wooden case with faded paper label on interior. Dimensions: Case height 5". Length 12.5".
• QUADRUM, MAGAZINE OF MODERN ART,
  QUADRUM, MAGAZINE OF MODERN ART, #1-11, 1956-61 (11) Vols, covers by Vasarely, Hartung, Michaux, Dubuffet, Ernst, Arp, Pollock, Capograssi, Nicholson, Sonderborg, and Bertrand, # 3 with Vasarely printed acetate insert, softcovers, 10.5"h x 8.25"w
• BRASS AND EBONY QUADRANT,
  BRASS AND EBONY QUADRANT, ENGLISH, CA. 1820 BYJAMES HUGHES (WORKED 1817-1822), LONDON. IN ORIGINAL STEPPED KEYSTONE OAK CASE. 15” X 14” X 4”. ALSO INCLUDED IN THIS LOT ARE THE EARLY MAKER’S LABELS, TWO FOR JAMES BASSNET (OPTICIAN), ONE FOR CHARLES JONES (LIVERPOOL). ONE OF THE BASSNET LABELS IS BADLY DAMAGED.
• EXCEEDINGLY RARE QUADRANT LABELED
  EXCEEDINGLY RARE QUADRANT LABELED FOR T.A. GARDNER, NANTUCKET NANTUCKET, CIRCA 1830 CASE HEIGHT 3.5". LENGTH 12.5".EXCEEDINGLY RARE QUADRANT LABELED FOR T.A. GARDNER, NANTUCKET, Nantucket, Circa 1830, Ebonized wood frame with inset ivory 0-95 degree scale. Brass index arm, sights, etc. Marked on inset ivory nameplate "T A Gardner Nantucket". In a wedge-shaped green-painted wooden case with a paper label on interior for "John Kehew, Nautical Instrument Maker ... New-Bedford ...". Lot also includes an August 11, 1832 issue of the Nantucket Inquirer, which has a listing for a "Nautical & Hardware Store. Thomas A. Gardner has for sale a general assortment of Hardware, amongst which may be found best bell metal Sextants; plain Quadrants; ...". Dimensions: Case height 3.5". Length 12.5". Provenance: Paul Madden Antiques, Sandwich, Massachusetts, June 20, 2005. Includes a copy of the original sales receipt, which indicates the quadrant was purchased from Mrs. Pflock of Cape Cod, who claimed it was found in a Newport, Rhode Island collection.The Collection of Michael Gill.Notes:According to Madden's notes, Thomas A. Gardner was born March 24, 1804 and married Eliza Drew on April 22, 1832. His shop was destroyed in a fire in 1848. He also writes the quadrant was probably English-made but that this was the only known example to have a Nantucket label.
• CASED QUADRANT BY RODGERSON,
  CASED QUADRANT BY RODGERSON, LIVERPOOL 19TH CENTURY CASE HEIGHT 4.25". LENGTH 12.75".CASED QUADRANT BY RODGERSON, LIVERPOOL, 19th Century, Marked on inset ivory panel "Rodgerson, Liverpool". Ebonized wood frame with inset ivory 0-110 degree scale. Brass index arm, sights, etc. In a wedge-shaped wooden case. Dimensions: Case height 4.25". Length 12.75".
• English Ebony and Brass Quadrant,
  English Ebony and Brass Quadrant, Thompson, London, early 19th century with inset ivory Vernier scale and maker's label length 12 in — 30.5 cm
• BRITISH HYDROGRAPHIC SURVEY
  BRITISH HYDROGRAPHIC SURVEY QUINTANT WITH PEDESTAL MOUNT CIRCA 1885 HEIGHT ON STAND 18". WIDTH OF ARC 10".BRITISH HYDROGRAPHIC SURVEY QUINTANT WITH PEDESTAL MOUNT, Circa 1885, By Henry Porter (Wm. Carey & Co). Signed on the index arm "Platina & Gold Cary London 980". Cross arm engraved "Captain A. Mostyn Field RN H.M. Ships 'Dart' 'Egerie'[ sic] 'Penguin' 'Research' 1885-1904 Presented to H.O.[Hydrographic Office] 1934" with Admiralty broad arrow mark. Quintant with a 12" radius arm, a platinum inset index that reads to 145 degrees of arc, and the vernier index on a pink gold inset. There are three horizon and four sun filters and the index arm features an unusual mounted adjustable bubble level. Along with a sighting tube are two telescopes (one with adjusting knob) and a spare lens. Original box label identifies the quintant as being made by Henry Porter, "Apprentice and successor to the late W. [William] Cary", the pedestal inscribed with the maker's name and location. Inside the box lid are two labels: "Henry Porter, apprentice and successor to the late W. Cary Optician & Mathematical Instrument Maker ..." and a certificate of examination for a class A instrument from the Kew Observatory, Richmond, Surrey, dated March 1885. Dimensions: Height on stand 18". Width of arc 10". Provenance: Capt. A. Mostyn Field, RN.West Sea Company, Old Towne, San Diego, June 2002.The Kelton Collection of Marine Art & Artifacts.
• A PAIR OF FEMALE MANNEQUINS 4th
  A PAIR OF FEMALE MANNEQUINS 4th quarter, 20th century; articulated at the shoulders, wrists, and waists, with painted facial details.
• MODEL OF A WELIN QUADRANT DAVIT
  MODEL OF A WELIN QUADRANT DAVIT EARLY 20TH CENTURY HEIGHT 9". WIDTH 13".MODEL OF A WELIN QUADRANT DAVIT, Early 20th Century, Made by the American Balsa Company, New York. Marked on base. Dimensions: Height 9". Width 13".
• First quarter 20th century the
  First quarter 20th century the top inlaid in an asymmetrical design with birds and branches 31'' H x 28.5'' W x 28.5'' D
• KELVIN-WHITE "CONSTELLATION" SHIP'S
  KELVIN-WHITE "CONSTELLATION" SHIP'S COMPASS 2nd quarter, 20th century; with protective housing.
• First quarter 20th century with
  First quarter 20th century with geometric design 5'0'' H x 3'3'' W
• Geometric Quilts American 19th
  Geometric Quilts American 19th century. Two quilts including one pieced Streak of Lightning quilt variation with rectangular bars arranged diagonally in rows and one pieced quilt with a geometric design in calico fabrics; largest 90.5 x 98 in. Condition: Both with corners cut out to fit four-post bed.
• HALF STAR PATTERN QUILTHalf star
  HALF STAR PATTERN QUILTHalf star pattern quilt. 90 alternating squares of green and half stars, prairie point edges. 86" x 75". Some fraying along edges, light staining, small tear to one green square, some staining visible on reverse.
• First quarter 20th century of
  First quarter 20th century of rectangular form with a pierced galleried rim and mirrored bottom marked ''Madin (sic) France'' with sixteen inset Baccarat crystal serving dishes each signed 'Baccarat' the tray 2'' H x 22'' W x 12.75'' D
• A Rare Octant/Quadrant ca.
  A Rare Octant/Quadrant ca. 1760-1810 BT Browning & Rust London Manufactured by Spencer Browning & Rust London (1790-1810 ) complete with wedge shaped mahogany box. Samuel Thaxter Trade label no. 125 State St. Boston Mass. Ebony frame ivory scales and brass fittings.
• 19TH CENTURY BRASS AND EBONY
  19TH CENTURY BRASS AND EBONY QUADRANT, SIGNED EAND GW BLUNT. ORIGINAL FITTED MAHOGANY CASE. CASE ALSO HAS TWO ORIGINAL PAPER LABELS, ONE OF MV O’NEAL, BALTIMORE, AND EUGENE F MEDINGER, NEW YORK. EXCELLENT ORIGINAL CONDITION. 13 1/2” X 12 1/2” X 4”.
• 19TH CENTURY BRASS AND EBONY
  19TH CENTURY BRASS AND EBONY QUADRANT BY JOHNCRICHTON AND SON OF LONDON. IN ORIGINAL FITTED MAHOGANY CASE WITH MAKER’S PAPER LABEL ATTACHED. ALSO SIGNED ON THE INSTRUMENT MADE SPECIFICALLY FOR T. L. AINSLEY OF SOUTH SHIELDS. BOX SIZE: 4” HIGH, 11 1/2” WIDE, 13” DEEP. PURCHASED MANY YEARS AGO FROM MARINE ANTIQUES, CHATHAM, MA.
• GROUP OF AMERICAN QUILT SQUARES.
  GROUP OF AMERICAN QUILT SQUARES. First half 20th century. Mostly machine stitched intricately stylized stars. Approximately 12" x 12". Together with some felt cigar rugs.
• Mariner's Compass variant quilt, 20
  Mariner's Compass variant quilt, 20 hand pieced squares, brown and gray printed cotton on white ground, brown binding, shell quilting throughout, probably Tennessee, late 19th/early 20th century, 89 x 70 in. Good condition, scattered light stains, fading, some browning to white ground. The Estate of the Late Thomas W. (Jack) and Dr. Frances Bernard Overall, Greeneville, Tennessee
• BURT'S EQUATORIAL SEXTANT CIRCA
  BURT'S EQUATORIAL SEXTANT CIRCA 1856 HEIGHT 14". WIDTH 11.5". DIAMETER OF CIRCLE 10.5".BURT'S EQUATORIAL SEXTANT, Circa 1856, By William Jones Young (American, 1800-1870). Inscribed "Patent applied for by Wm.A.Burt #5". Based on a design by William Burt (American, 1792-1858), this complex navigational instrument is known as a "reflecting" equatorial sextant, with a brass 10½" diameter vertical meridian circle supporting the "solar sextant" mechanism within. A latitude circle rides within the meridian circle, adjusted by clamp and tangent screw, and carries the hour angle ring with its canted silver scale and vernier, clamp and fine motion, and linkage to the sextant. The sextant itself is mounted on a horizontal azimuth circle, and is equipped with two mirrors, two filters, peep sight, auxiliary telescope, and solar declination adjustment to the horizon mirror. There are inlaid silver scales and one-arc-minute silver verniers, plus two removable index arms for calibration. Complete with adjustable stand with rotation clamp and tangent screw and original mahogany carrying case. Dimensions: Height 14". Width 11.5". Diameter of circle 10.5". Provenance: Tesseract, Hastings-on-Hudson, New York, 1994.The Kelton Collection of Marine Art & Artifacts.Notes:Only seven equatorial sextants are believed to have been made, and three of these, all made by Young, are the "reflecting" style. William Burt provided them to Lt. Matthew Fontaine Maury of the U.S. Navy for evaluation in 1856. Maury purchased them April 21, 1856 for $200 each. One was given to the U.S. Naval Academy and two to the Naval Observatory in 1893. The Naval Observatory states their records indicate they disposed of the instruments in 1898, but one is still recorded at the Naval Academy. This instrument is believed to be the last of the three William Young examples.
• Box Brass Naval Ship Quarters
  Box Brass Naval Ship Quarters Plaques
• A sundial sphere, the oval base
  A sundial sphere, the oval base with signs of the zodiac, 74.5cm high
• Probably mid 19th century lacking
  Probably mid 19th century lacking signature the 1.5-inch terrestrial globe covered with 12-gore printed paper map surrounded by a series of seven interlocking printed paper-covered wooden armillary rings representing the circles of the heavens including equinoctial line and Tropics of Cancer and Capricorn intersected by polar colures representing solstices and equinoxes full-meridian marked with degrees of elevation at the North and South poles and climates according to month and horizon band showing the Gregorian and Zodiacal calendars over two half-rings printed with latitudes and longitudes of major cities on a turned ebonized wood stand 18.5'' H x 12'' Dia.