- Museum number
CHROME-PLATED CASED SPLIT-SECOND WRIST-CHRONOGRAPH WITH CLUB-TOOTH LEVER ESCAPEMENT AND BLACK LEATHER STRAP.
Movement with club-tooth lever escapement.
Black dial with luminous-painted Arabic hour numerals; to left and right sunk subsidiary dials for seconds and chronograph minutes.
Luminous-painted metal hands.
Chromium-plated case; screw-on stainless-steel back.
Chronograph mechanism mounted on back of movement has start, stop and fly-back functions for the independent seconds, operated by buttons on the case band.
Black leather wrist-strap.
- Production date
Diameter: 41 millimetres
- Curator's comments
- Comment from Richard Good, Catalogue of Watches in the British Museum. Vol. V (Unpublished manuscript)
Made by Hanhart.(1)
Germany, c. 1955.(2)
Chronograph wrist watch with club tooth lever escapement.
Signature: On the dial 'Hanhart 17 STEINE'
Case: A base metal case, chrome plated with a stainless steel screw back. On the back 'BODEN EDELSTAHL WASSERGESCHÜTZT. STOSSFEST 119462'.
Dial & Hands: A metal dial painted black with Arabic numerals luminised. Two subsidiary dials, a seconds dial at 9 o'clock and a minute dial with 30 divisions numbered at every five minutes. The numbers on both of these dials are in white. On the back of the dial in white is "nx e 13 4 a".
The hour and minute hands skeletonised and filled luminous. The centre seconds, small seconds and minute counter hands all painted white.
Ebauche Marks: none.
Frame: A nickel silver movement. A bridge for the barrel and train, cocks for the escape wheel, pallets and balance. The train plate numbered 19462.
Barrel and Mainspring: A recessed cover to the going barrel.
Barrel: I diameter 14.0 mm., height 2.7 mm.
Mainspring: height 2.65 mm., thickness 0.18 mm.
Barrel Arbor: diameter 4.55 mm., snailed.
Hooking: Milled from the barrel wall.
Train: All the brass wheels gilded, the centre, 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.
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 13.5 mm., thickness 0.8 mm. A 'self compensating' flat spiral spring with 14 ½ turns.
Means of Regulation: An index on the balance cock registers against a divided scale with + and - engraved on the balance cock table.
A boot is fitted to cover two curb pins.
Train Counts and Beat Rate:
Great wheel 100 (barrel)
Centre wheel 80 pinion 12
Third wheel 60 pinion 10
Fourth wheel 70 pinion 8
Escape wheel 15 pinion 7
Beat rate 18,000
Motion work: cannon pinion 12
minute wheel 36, minute pinion 10
hour wheel 40
Chronograph work: Standard type with a castle wheel and a horizontally moving transfer wheel. Operated by two buttons.
Winding System: Conventional positive stem set keyless work.
Case: Diameter 41.0 mm., height 13.5 mm., over the glass.
Movement: Diameter 34.9 mm., height 8.5 mm.
Provenance: Purchased in 1987 with the aid of funds from the Dingwall Bequest.
(1) For a similar watch see 'Wristwatches' no. 457 a and b p. 292. Hanhart are briefly mentioned on p. 117.
(2) Abelar gives the history of this firm in 'Meister der Uhrmacherkunst', p. 254. and reports that the firm opened soon after the end of the war, which had closed them down. However this watch was first produced in 1939 as a pilot's watch with production ceasing after the war. It was revived for use by the French forces in 1948 and a few years after this was used again by the German forces. It was finally phased out in 1962 but is now available again in a limited edition of 2,500 pieces. By 1958 the quality of their cases improved dramatically thus putting this watch between these two dates.
Literature: 'Chronographen Armbanduhren' by Lang and Meis ill 114.
- Not on display
- Acquisition date
- Britain, Europe and Prehistory
- Registration number