- Museum number
GILT BRASS CASED PIN-PALLET LEVER WATCH.
Thirty-hour key wound movement with pin-pallet lever escapement.
White paper dial with Roman numerals and subsidiary seconds.
Blued steel hands.
Brass case retaining some original lacquer.
- Production date
Diameter: 63.20 millimetres (case)
Diameter: 46.50 millimetres (dial)
Thickness: 33.60 millimetres
- Curator's comments
- Comment from Richard Good, Catalogue of Watches in the British Museum. Vol. V (Unpublished manuscript)
Made by Ingersoll
Waterbury, Connecticut USA, 1890
Key wound watch with a pin pallet lever escapement.
Signature: On the dial "R.H. INGERSOLL & BRO NEW YORK".
On the dial side of the front plate is the trade mark - a bee- in a circular cartouche with around the cartouche 'WATERBURY CLOCK U.S.A.'
Case: A two piece gilt lacquered case, much of the lacquer worn off. A hinged back. The bezel is soldered into the case front and the movement a light press fit in the case secured by what is effectively a bayonet catch.
Dial Plate: The dial plate, which is nickel silver, is a dished annular ring with stamped on it on the side next to the movement 'PAT'D MARCH 5th 1889' This is fixed to the movement with three screws. The dial has three pillars which rest in three holes in the dial plate but the dial is not otherwise fixed but is kept in position once the movement is in the case.
Dial and Hands: A dirty white paper dial mounted on a metal backing plate. Black Roman numerals and minute circle. A subsidiary seconds dial. Blued-steel spade hands, blued steel seconds hand.
Ebauche Marks: None.
Frame: A type 0 movement, not numbered , nickel silver plates. Four brass pillars support the back plate which is secured by nuts.
Barrel and spring: Going barrel with the great wheel acting as the cover. The great wheel is pierced with five crossings.
Barrel inside diameter 19.6 mm., height 5.0 mm.
Mainspring height 13 mm., thickness 0.24 mm.
Arbor diameter 5 mm., not snailed
Jewels: No jewels, the balance staff has cone ends which run in steel cups with that in the front plate being adjustable.
Gear Train: The brass wheels with five crossings except for the escape wheel which has three.
Escapement: A straight line layout pin pallet lever escapement with a long lever and a type of double roller. A steel cylindrical impulse pin set in the balance arm. , the small roller is steel. The steel lever has steel wedge shaped impulse pins and a brass dart. An equal impulse escapement.
Number of teeth embraced 3 ½.
Train Counts and Beat Rate:
Great wheel 56
Centre wheel 60 pinion 8
Third wheel 56 pinion 8
Fourth wheel 56 pinion 7
Escape wheel 15 pinion 7
Beat Rate 14,400
The pinions are lantern type.
Motion Work: The minute wheel is between the plates and the pinion above the front plate, the two being riveted together.
Minute wheel 36, pinion 10, hour wheel 40, cannon pinion 12.
Balance and Spring: A brass balance with six nibs to simulate screws. Balance diameter 17.5 mm., thickness 1.0 mm. Flat spiral blued-steel balance spring with 13 turns.
Regulating System: An index on the back plate registering against the letters 'S' and 'F'.
Winding system: The winding key body is integral with the ratchet wheel. The ratchet is riveted to the back plate as is its spring.
The hand set button is a push fit on the extended centre arbor.
Dimensions: Case diameter 63 mm., height 33.8 mm., over the glass.
Dial plate diameter 61.7 mm.
Movement diameter 61.5 mm., over the dial plate, diameter of movement plates 52.3 mm., height 28 mm.
Provenance: Donated by the Heron Corporation in 1983.
Note: This is in reality a clock modified somewhat so as to make it possible to use it as a watch.
- Not on display
Latest: 5 (2017) active rust on lever
4 (Feb 1995) Rust on lever.
- Acquisition date
- Britain, Europe and Prehistory
- Registration number