- Museum number
LEATHER CASED FOB WATCH.
Movement with club-tooth lever escapement; keyless winding, button at 6 o'clock.
White dial with outer circle for the minutes surrounding silver-coloured ring with bars at the hours, numbered on inside 3, 6, 9, 12.
Hour and minute hands.
Chromium-plated case with snap-on glazed back and bezel; outer case of leather-covered disc with watch in middle; looped through a hole at top is a double leather thong with leather button at end.
- Production date
Diameter: 45 millimetres (case)
Diameter: 23.70 millimetres (dial)
Diameter: 16.10 millimetres (leather button)
Length: 170 millimetres (double leather thong)
Thickness: 12 millimetres
- Curator's comments
- Comment from Richard Good, Catalogue of Watches in the British Museum. Vol. V (Unpublished manuscript)
Made by Mido
Switzerland, c. 1965
Fob watch with a club tooth lever escapement.
Signature: On the dial 'Mido' and 'SWITZERLAND'. On the back of the movement is 'MIDO LTD SWISS 15 FIFTEEN JEWELS UNADJUSTED'.
Case: A chrome plated case with a threaded middle with both the back and front bezels, which are glazed, screwed on.
A brown leather thong supports the brown leather surround to the case. At its upper end the thong terminates in a leather covered button so that the watch can be attached to the lapel and put into a breast pocket.
Dial & Hands: The metal dial has a matt silvered chapter ring with inside a bright circle with batons long at the 12, 3, 6 and 9 o'clock positions and short at the other hours. The minute circle is black, as are the numbers 12,3, 6 and 9
The dial has two feet which pass through the front plate and are retained by dog screws. The baton hands are red gold coloured.
Movement: A nickel silver movement with a Geneva stripe finish on the back.
Ebauche Marks: Could not be ascertained.
Frame: Bridges for the barrel the centre third and fourth wheels and cocks for the escape wheel, the pallets and the balance.
Barrel and Mainspring: A nickel silver going barrel with a recessed cover.
Barrel I. diameter 9.3 mm., height 1.6 mm.
Mainspring height 1.25 mm., thickness 0.13. The mainspring is broken.
Arbor: diameter 3 mm., snailed.
Hooking: Milled from the barrel wall.
Train: The wheels are beryllium copper, the centre wheel, third and fourth wheels with five crossings, the escape wheel with four.
Jewelling: Jewelled bearings from the third wheel onwards, all the jewels pressed in. Ruby endstones to the balance jewels.
Escapement: A straight line layout club tooth lever escapement with short lever, double roller and D-shaped impulse pin. The beryllium copper lever has exposed pallet stones which have flat acting faces. A beryllium copper escape wheel with four crossings.
An equal impulse escapement.
No. of teeth embraced 3½.
Balance & Spring: a monometallic beryllium copper balance with gold screws. Balance diameter 8.90 mm., thickness 0.74 mm. A 'self compensating' flat spiral spring with 10 ¾ turns.
Means of Regulation: An index on the balance cock registers against a divided scale with engraved 'F' and 'S'.
Train Counts and Beat Rate:
Great wheel 72 (barrel)
Centre 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: Could not be ascertained.
Winding System: Conventional stem set positive keyless work .
Case: The leather surround dimeter 45.7 mm., 6thickness 4.4 mm. bezel diameters 28.1 mm., height over the glasses 12 mm. The case middle 25.2 mm.
Movement: diameter 23 mm., height, estimated, 7 mm.
Provenance: Donated by H.R.H. The Duke of Gloucester in 1986
Note: The front bezel of this watch was found to be impossible to remove without the risk of damage to the case. Because of this it was not possible to ascertain all of the information normally provided.
- Not on display
- Exhibition history
1991, London, The British Museum, Collecting the Twentieth Century
- Latest: 3 (2017)
- Acquisition date
- Britain, Europe and Prehistory
- Registration number