- Museum number
SILVER-CASED LEVER WATCH WITH CENTRE-SECONDS, FOR THE CHINESE MARKET.
Silver case; glazed cuvette.
Diameter: 40 millimetres (case)
Diameter: 34.30 millimetres (dial)
Thickness: 14.20 millimetres
- Curator's comments
- Comment from Richard Good, Catalogue of Watches in the British Museum. Vol. V (Unpublished manuscript)
Maker anonymous but probably Bovet
Switzerland, c. 1860
Watch for the Chinese market with a club tooth lever escapement.
Case: Silver open face case with a sprung and glazed cuvette pierced for hand setting and winding, the glass broken. Fake hall-marks in the back with a stylised rosette engraved in the centre.
Dial and Hands: Domed dial, 1/5 seconds marks on the minute circle, the minutes numbered 60, 15, 30, 45. In the counter enamel, in black, is PL. Blued-steel spade hour and minute hands, blue-steel centre seconds hand.
Dial Plate: No dial plate.
Cuvette: mounted on an edge ring, to which it is hinged. It is opened by a spring and a sprung catch releases it. It is glazed with the glass pierced with winding and hand set holes. The cuvette has an engraved edge. Its glass is broken.
Ebauche Marks: 256. Also scratched is 1256.
Frame: Skeletonised movement without a barrel bridge but with a train bridge, a combined escape wheel and pallet cock and a balance cock. The fourth wheel is set at the centre of the movement. The movement is florally engraved. The balance cock is pierced out as is the train bridge
Barrel and Mainspring: A standing going barrel with Continental stopwork, the finger present but the gear missing. The barrel engraved to match the rest of the movement. A recessed cover to the barrel: Internal diameter 13 mm., height 2.1 mm.
Mainspring: height 2.1 mm., thickness 0.18 mm.
Arbor: diameter 4.4 mm., snailed.
Hooking: A pressed in tongue in the barrel wall.
Train: The wheels gilded one side only and with 5 crossings, except for the steel escape wheel which has 4.
Jewelled: From the third onwards in the back plate of the movement, only the escapement is jewelled in the front plate.
Escapement: Club tooth lever, straight line layout, long lever, single roller, impulse pin elliptical. The pallet jewels are flat on their acting faces. Escape wheel steel, teeth chamfered. Pallet frame with poising tail this has an ornamental jewel set into it. The pallet staff is screwed in.
Number of teeth embraced, 3½.
Balance: A bimetallic balance but not cut. The screws are brass. Balance diameter 12.75 mm., thickness 0.83 mm. Blued-steel flat spiral spring with 13 turns.
Means of Regulation: Index on the balance cock registering against a divided scale with engraved 'F S'.
Train Counts and Beat Rate:
Great wheel (barrel) 80
Second wheel 64 pinion 10
Third wheel 60 pinion 8
Fourth wheel 60 pinion 8
Escape wheel 15 pinion 6
Beat rate 18,000
Motion work: cannon wheel 24
Minute wheel 36, minute pinion 8
Intermediate wheel on 'centre' arbor 24.
Hour wheel 64
Winding System: Keywound
Dimensions: Case diameter 39.7 mm., height 21.2 mm. (over the glass)
Movement: diameter 33.0 mm., height 10.0 mm.
Provenance: Formerly in the Ilbert collection.
- Not on display
Latest: 4 (2017)
- Acquisition date
- Acquisition notes
- Following the successful acquisition of the celebrated Ilbert collection of clocks (1958,1006 collection), prints and other related materials made possible by the generous donation of funds by Gilbert Edgar CBE Ilbert's watches were then acquired using funds provided by Gilbert Edgar, public donations and government funds.
- Britain, Europe and Prehistory
- Registration number
- Additional IDs
Previous owner/ex-collection number: B15 (Ilbert Ledger)
Previous owner/ex-collection number: CAI.0954 (Ilbert Collection)