- Museum number
CHROME-PLATED NICKEL CASED LEVER WATCH.
Pin-pallet lever escapement; manual hand-set on back of dome.
Paper dial; hours I-XII.
Nickel-chrome case; glass missing.
Pendant bow missing.
Diameter: 41.60 millimetres (case)
Diameter: 29.10 millimetres (dial)
Thickness: 14.80 millimetres
- Curator's comments
- Comment from Richard Good, Catalogue of Watches in the British Museum. Vol. V (Unpublished manuscript)
ANONYMOUS (but by Theil)
Germany, c. 1880
Watch with pin pallet lever escapement.
Case: A chrome plated case with a hinged back and a snap on bezel. An inner back which is one with the band. Through the back pass the four screws which secure the movement to the case, the back is numbered 3344. This inner back also acts as the barrel cover. The bow is missing.
Dial and Hands: A printed dial with black Roman numerals and minute marks. The dial is of card and has three holes which fit over the heads of three shouldered screws, these screws being the movement pillar screws. The hands are missing.
Movement: Numbered 37840???
Frame: The centre wheel is keyed into the barrel arbor and is thus driven direct. The construction is full plate with the back plate supported by three pillars and also traps the keyless block. The click and click spring combined is also between the plates with at its end a tongue that is bent up and passes through a gap in the back plate and into the teeth of the barrel ratchet.
Barrel and Mainspring: Barrel effective inside diameter 25.5 mm. The spring actually is restrained by 6 nibs which are bent up from the winding wheel which also serves as the barrel bottom.
Mainspring height 2.00 mm., thickness 0.17 mm.
Going Arbor: Diameter 6.00 mm., not snailed
Hooking: The end of the spring is bent around one of the nibs.
Train: The brass wheels with five crossings, escape wheel with four.
Jewelled: No jewels
Escapement: A pin pallet escapement with a straight line layout, a long lever. Cylindrical steel impulse pin and steel pallet pins.
An equal impulse escapement.
Number of teeth embraced 3 ½.
Balance and Spring: A brass three arm balance diameter 14.3 mm., thickness 0.56 mm.
The flat spiral blued-steel spring with 11 turns
Means of Regulation: An index on the back plate which passes through the inner cover of the case which is stamped with a centre mark and 'A R'.
Train Counts and Beat Rate:
Centre wheel 72 (Many teeth bent over presumably this happened when the mainspring broke).
Third wheel 60 pinion 9 (one revolution in 7.5 hours)
Escape wheel 15 pinion 6 (one revolution in 45 seconds)
Beat Rate 2,400
(One turn of the barrel will only give 1 hours run).
Motion Work: Cannon pinion 10, minute wheel 30, minute pinion 8, hour wheel 32.
Winding system: The mainspring is wound from the pendant with a winding wheel meshing directly with the teeth on the barrel bottom. The handsetting is by a friction wheel mounted directly on the slipping arbor that passes through the barrel arbor and the centre wheel and that carries the cannon pinion.
Dimensions: Case diameter 41.1 mm., height 13.9 mm.
Movement diameter 36.2 mm., height 11.0 mm.
Provenance: Formerly in the Ilbert collection.
In about 1890 at Ruhla Thuringia in Germany, Theil set up to make these curious watches which had the spring covering the back of the movement, rather like a Waterbury. In this calibre however the barrel arbor drives the centre wheel directly which leads to the unsatisfactory short length of run. There are altogether six of these watches in the collection and they display both differences in size and design although they are basically the same. The others are registration nos 1958,1201.1103 - 1106). Some of these watches were exported to England and marked 'Fearless'
See Cutmore 1991 pp. 33, 34, 35, and 88.
This watch has astonishingly few components, 51 in total, a triumph of design!
- Not on display
- Latest: 3 (2017)
- Acquisition date
- Britain, Europe and Prehistory
- Registration number
- Additional IDs
Previous owner/ex-collection number: CAI.1101 (Ilbert Collection)