mechanical equatorial sundial
Datecirca 1725
Inventory Number7120
ClassificationSundial
Subject
Maker
Claude Dunod
Cultural Region
Place of Origin
Dimensionsopen - as photographed: 8.3 × 8.6 × 9 cm (3 1/4 × 3 3/8 × 3 9/16 in.)
closed: 3.3 × 8.6 × 9.2 cm (1 5/16 × 3 3/8 × 3 5/8 in.)
box: 4.7 × 11 × 11.2 cm (1 7/8 × 4 5/16 × 4 7/16 in.)
closed: 3.3 × 8.6 × 9.2 cm (1 5/16 × 3 3/8 × 3 5/8 in.)
box: 4.7 × 11 × 11.2 cm (1 7/8 × 4 5/16 × 4 7/16 in.)
Material
AccessoriesNone. Unit is housed in a protective box
DescriptionEquinoctial dial with a continuous circular chapter ring marked 1-12, 1-12 with a toothed outer rim that engages a second dial with pointer bearing the markings I-XII and 60 subdivisions. The vertical angle of the chapter ring is set to a fixed latitude of 51° North by means of a hinged bar that engages a small hole in the frame. The compass rose is divided into 32 points with the four major points marked "SE", "OR", "ME" and "OC". There is an additional scale spanning 360° with 2° subdivisions. The magnetic declination is marked at 15° W.,octagonal
mech. equinoctial sundial
mech. equinoctial sundial
Curatorial RemarksAppraisal by Brieux, 9/24/84: $3000. Dusseldorf is at a latitude of 51,13° N.
FunctionThe local time at a fixed latitude of 51° can be found by aligning the sun with one of three apertures.
ProvenanceJoseph Drecker, Aachen, Germany, before 1928 (no. 105); Frederik Casparus Wieder, Noordwijk, The Netherlands, 1928; D. P. Wheatland, Topsfield, MA, 1959; gift to CHSI, ca. 1987.
English
Date: circa 1770
Accessories: Fitted red leather case with red cloth interior.
Object number: 7119
Al. Zimmerman
Date: circa 1840
Accessories: Original wood and brown leather case.
Object number: 7487
Legey
Date: circa 1838
Accessories: shades with double tabs (4); shades with single tab (4); screwdriver and square key.
Object number: 5268
Jacobus Lusberg
Date: date 1688
Accessories: Oval green sharkskin fitted case and seperate plummet.
Object number: 7068
Christiaen Christiaensen
Date: circa 1650
Accessories: None. On 6/22/98 an envelope with the chapter ring for this dial was found in 1V-2b. JR. Chapter ring added to unit 6/13/02G CK
Object number: 7262
G. Winckler
Date: 1790
Accessories: Leather covered rectangular case and 4 leveling screws. Paper with calculations in pencil and printed "KUNSTAUKTIONSHAUS Math. Lempertz ...Koln " loose in case.
Object number: 7106
Italian
Date: date 1627
Accessories: Housed in a wooden case with loose cover.
Object number: 7191
