- Museum number
SILVER CASED LEVER WATCH.
Full-plate; two going-barrels.
Lever escapement; split bi-metallic balance.
Enamel dial with sunk subsidiary seconds.
Minute hand not original; hour and seconds hands missing.
Silver open-faced engine-turned case; shield and garter on back.
- Production date
- 1902 (case)
Diameter: 59.20 millimetres (case)
Diameter: 49.30 millimetres (dial)
Thickness: 23.60 millimetres
- Curator's comments
- Comment from Richard Good, Catalogue of Watches in the British Museum. Vol. V (Unpublished manuscript)
Silver cased watch with a club tooth lever escapement.
Signature: Only the number on the barrel bridge 536396. On the dial 'IMPROVED PATENT ENGLISH LEVER'.
Case: Silver consular case HM Birmingham 1902 makers mark WE. Also stamped with the number 536396 and 1C. The pendant with the makers mark CH. The case band is reeded, the back of the case is engine turned with a shield at its centre.
Dial and Hands: Flat dial with heavy numerals and sunk subsidiary seconds. Spade minute hand not original, others missing.
Brass Edge: none intended.
Dust Cap: Stamped inside 536 396.(1)
Ebauche Marks: 536396
Frame: A full plate layout. The balance potence riveted into the back plate. Stamped under the bottom plate 536396. Stamped under the balance cock and the barrel bridge is 6396.
Barrel and Mainspring: Going barrel I. diameter 17.6 mm., height 3.2 mm.
Mainspring: height 3.1 mm., thickness 0.23 mm.
Arbor: diameter 5.9 mm., snailed.
Hooking: T piece, pivoted both ends.
Train: Centre, third and fourth wheels with five crossings, the escape wheel with four. All the gear teeth have round bottoms. The centre pinion is a head pressed onto the arbor. The fourth pinion is a replacement.
Jewelled: Only at the balance pivots. Screwed settings, ruby endstones.
Escapement: A club tooth lever escapement, right angle layout, short lever, single roller, the impulse jewel D
shaped. The pallet arm screwed to the pallet body. Exposed pallet stones, convex on the impulse face. A mixed escapement.
No of teeth embraced 3 ½
Balance: A split bimetallic balance, diameter 17.0 mm, thickness 1.4 mm. Blued-steel flat spiral spring with 16 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
Intermediate wheel 70
Centre wheel 64 pinion 12
Third wheel 60 pinion 8
Fourth wheel 63 pinion 8
Escape wheel 15 pinion 7
Beat Rate: 16,200
Motion work: snap on cannon pinion 14, minute wheel and
minute pinion missing, hour wheel 48.
Winding System: Keywound.
Dimensions: Movement diameter 50.0 mm, height 14.0 mm.
Provenance: Formerly in the Ilbert collection. Ilbert purchased this from Wartski in 1930.
(1) This is late for the provision of a dust cap.
- Not on display
Latest: 4 (Feb 2019)
5 (Jan 2019) weeping
5 (2017) weeping
- Acquisition date
- Britain, Europe and Prehistory
- Registration number
- Additional IDs
Previous owner/ex-collection number: CAI.0955 (Ilbert Collection)
Previous owner/ex-collection number: F72 (Ilbert Ledger)