chronometer associated with chronograph
Datecirca 1900
Inventory NumberDW0471a
ClassificationChronometer
Subject
User
Institute of Geographical Exploration
1929 - 1952
Cultural Region
Place of Origin
Dimensions8.7 × 16.3 × 15.3 cm (3 7/16 × 6 7/16 × 6 in.)
Material
Accessorieswinding key; geared allen wrench; leather holster. Associated with printing chronograph.
DescriptionChronometer is fixed within an aluminum case, which in turn sits inside a removable brown leather carrying case. The allen wrench in the holster is of a different finish from the key, so it may not be original, but it fits the square nut on the hands of chronograph.
There is a divided circle around the outside of dial with sixty gradations. The numbers 1-60 appear along the outside of the circle in intervals of five, and the numbers 0-23 along the inside of the circle. It serves both hours and minutes. Two blued, metal hands are affixed to the center of the face. There are two dials inside of the face, each with a blued hand. The winding dial at the top has numbers 0-56 going counter-clockwise around, in intervals of eight. On the top dial, "UP" is printed above the "0", "DOWN" is printed above the "56", and "WIND" stands in place of the 24. The dial at the bottom is for seconds, with the numbers 0-60, labeled every 10 printed clockwise.
The clock movement is visible in the center of the bottom dial.
A brass winding key is illustrated in the winding position protruding from the clock face, along with the allen wrench attached as well.
There is a divided circle around the outside of dial with sixty gradations. The numbers 1-60 appear along the outside of the circle in intervals of five, and the numbers 0-23 along the inside of the circle. It serves both hours and minutes. Two blued, metal hands are affixed to the center of the face. There are two dials inside of the face, each with a blued hand. The winding dial at the top has numbers 0-56 going counter-clockwise around, in intervals of eight. On the top dial, "UP" is printed above the "0", "DOWN" is printed above the "56", and "WIND" stands in place of the 24. The dial at the bottom is for seconds, with the numbers 0-60, labeled every 10 printed clockwise.
The clock movement is visible in the center of the bottom dial.
A brass winding key is illustrated in the winding position protruding from the clock face, along with the allen wrench attached as well.
In Collection(s)
Signedon case: T. & F. MERCER / OCTO [in star logo] / ST. ALBANS, ENG.
on dial: Thomas Mercer / St. Albans, Eng. No. [??]82
Curatorial RemarksThis chronometer is actually part of a corresponding chronograph (Inventory #DW471b); blued needle; patent # 261655.
FunctionUsed for geographic exploration.
ProvenanceDavid Wheatland purchased from the Harvard Institute of Geographical Exploration, Harvard University, 1957.
Charles Frodsham & Company, Ltd
Date: circa 1900
Accessories: "Tipsy" winding key; (box key missing)
Object number: DW0360
Charles Frodsham
Date: circa 1865
Accessories: winding key.
Object number: 1998-1-1319
John Pepys
Date: 1680-1708
Accessories: Key on cotton ribbon
Object number: 7953
The Gaertner Scientific Corporation
Date: circa 1925
Accessories: advertising sheet for Gaertner Scientific Corp's probator [in instrument file with two photocopies]; tip for use as stopwatch; rubber tip
Object number: 1996-1-0259
George Lindsay
Date: 1724
Accessories: Winding key; box.
Object number: 1990-1-0007
Thomas de Colmar
Date: circa 1860
Accessories: two instruction books (in French) dated 1856, 1860; explanatory article by F. Reuleaux (in German) dated 1892
Object number: 1990-5-0026
See also/See also
