- Museum number
CHROME-PLATED CASED BLACK DIALLED CENTRE-SECONDS JEWELLED LEVER WRIST-WATCH WITH ALARM.
Movement with club-tooth lever escapement and alarm mechanism.
Balance has four arms.
Black painted metal dial with raised gilt baton hour markers.
Stainless-steel pierced hour, minute and centre-seconds hands; gilt-metal alarm-setting hand.
Chromium-plated case with screw-on stainless-steel back.
- Production date
Diameter: 34.40 millimetres
- Curator's comments
- Comment from Richard Good, Catalogue of Watches in the British Museum. Vol. V (Unpublished manuscript)
Made by Girard Perragaux
Switzerland, c. 1955
Wrist Watch with alarm and a club tooth lever escapement.
Signature: On the dial is 'Girard Perragaux', the trade mark 'GP' and 'ALARM'. 'Girard Perragaux & Co' is on the upper train bridge.
Case: A three part case with the bezel snapped on and the back that acts as the bell held down by a screwed ring. On the back is engraved 'CABOT' which is situated between two lines and which crosses a representation of the sun?, DON M. COMLEY 25 YEARS SERVICE NOVEMBER 1. 1931 SEPTEMBER 15. 1956' Also the makers number 71140156 and 'STAINLES STEEL' Inside the back is 'GIRARD - PERRAGAUX SWISS STAINLES STEEL' and R.
A post is riveted into the back for the alarm hammer to strike.
Dial & Hands: A black dial with gilt batons at the hours with double batons at the 12, 3, 6 and 9 o'clock positions, and there are luminous dots at the hours. The minutes are marked between the hours with gilt dots. The alarm hand is gilt but the hour minute and centre seconds hands are rhodium plated. These latter three hands are pierced and filled luminous.
Movement: A nickel silver movement.(1)
Frame: A bridge for the going barrel and centre wheel this is engraved 'UNADJUSTED SWISS'. A bridge for the alarm barrel and train, one for the centre wheel and another for the going train, this engraved 'Girard Perragaux & Co SEVENTEEN 17 JEWELS 11 U 963'. Cocks for the pallets and balance with this latter engraved with an import mark 'GXM'.
Barrels and Mainsprings:
Going Barrel: I diameter 9.2 mm., height 1.5 mm.
Mainspring: height 1.5 mm., thickness 0.11 mm.
Barrel Arbor: diameter 2.95 mm., snailed.
Hooking: Milled from the barrel wall.
Alarm Barrel: I diameter 8.2 mm., height 1.9 mm.
Mainspring: height 1.9 mm., thickness 0.08 mm.
Barrel Arbor: diameter 2.40 mm., snailed.
Hooking: Milled from the barrel wall.
Both barrel covers are recessed.
Train: All the wheels gilded, the centre wheel, third and fourth wheels with five crossings. The steel escape wheel with four.
Jewelling: Jewelled bearings from the third wheel onwards, all the jewels pressed in. Incabloc shock protection to the balance. The alarm train escape wheel pivots are jewelled and the lower pivot of the hammer.
Escapement: A straight line layout club tooth lever escapement with short lever, double roller and D-shaped impulse pin. The exposed pallet stones have flat acting faces. A steel escape wheel with four crossings.
An equidistant locking escapement.
No. of teeth embraced 3½.
Balance & Spring: a monometallic balance with brass screws. Balance diameter 9.7 mm., thickness 0.65 mm. A 'self compensating' flat spiral spring with 12 turns.
Means of Regulation: An index on the balance cock registers against a divided scale with '+' and '-' engraved on the balance cock table.
Train Counts and Beat Rate:
Great wheel 70 (barrel)
Centre wheel 64 pinion 10
Third wheel 60 pinion 8
Fourth wheel 70 pinion 8
Escape wheel 15 pinion 7
Beat rate 18,000
Motion work: cannon pinion 10
minute wheel 30, minute pinion 8
hour wheel 32
Winding System: There are two buttons, one for the alarm work and one for the going. The going train has conventional stem set positive keyless work but the alarm train has stem set rocking bar keyless work.
Alarm System: A conventional alarm system where the hour wheel can rise when three lugs on it coincide with three slots in the alarm wheel and in rising frees the alarm train via a lever.
Great wheel (Barrel) 78 teeth. Alarm wheel 14 pinion 7
Case: diameter 34.4 mm., height 10.6 mm.
Movement: diameter 26.0 mm., height 8.4 mm.
Provenance: Purchased in 1987 with the aid of funds from the Dingwall Bequest.
(1) This is in fact a Vulcain movement.
- Not on display
- Acquisition date
- Britain, Europe and Prehistory
- Registration number