- Museum number
MOVEMENT AND DIAL OF A LEVER WATCH WITH UP AND DOWN INDICATOR.
3/4-plate movement; fusee; Harrison's maintaining power.
Ratchet-tooth lever escapement; up and down indicator.
White enamel dial; hours I-XII; sunk subsidiary seconds and up-and-down dial below XII.
Blued steel spade hands.
- Production date
- 1913 (escapement)
Diameter: 42.10 millimetres (back-plate)
Diameter: 44.50 millimetres (dial)
Thickness: 11.10 millimetres
- Curator's comments
- Comment from Anthony G. Randall and Richard Good, Catalogue of Watches in the British Museum. Vol. VI (1990)
Made by Hunt and Roskell, 1860-1910
Keyless Going Barrel Timepiece
Signature: On the back plate 'Hunt and Roskell 156 New Bond Str' London No 12923. Lever Escapement by V. Kullberg 1913'.
Case: No case, but was open face.
Dial and hands: Flat enamel dial with sunk subsidiary seconds and up-and-down dials. Blued steel spade hands.
Ebauche marks: 16 J.P. 2 (Joseph Preston, Prescot) (see registration no. 1958,1201.1030).
Front plate diam. 44.4 mm; back plate diam. 42.4 mm; frame h. 7.6 mm.
Frame: Typical half plate construction for an open face calibre.
Fusee: The usual stop-work with integral stop-piece and spring, and maintaining power with steel ratchet wheel. Setting-up-work under the dial on the front plate in a recess. The fusee arbor squared at the back even though keyless work is fitted. Two pegs and a dog screw for securing the movement in the case.
Going train: Typical layout and construction.
Jewelling: All the going train bearings jewelled as far as and including the centre arbor. The fourth jewel in the cock not in a setting. The escapement bearings jewelled and with endstones. Diamond endstone in the balance cock in a blued steel ring.
Escapement: Typical English ratchet-toothed lever with table roller. The escape wheel brass, the pallet frame and fork polished steel, the banking pins working on the fork tail, round jewel impulse pin.(1)
Balance: Bimetallic two-armed compensation balance with gold screws and quarter screws. Diam. 18.1 mm, h. 1.8 mm.
Balance spring: Blued steel spiral spring with overcoil and terminal curve, free sprung to a diamond-shaped stud on the balance cock. The collet of polished steel with two flats.
Provenance: Ilbert Collection.
(1) Holes are provided in the front plate for a spring detent, and the type of banking piece fitted concentric with the balance axis. The escape wheel and pallet cock has one steady pin cut off and another fitted in a new position, and a steady pin hole has been filled in the front plate.
There seems little doubt that a detent escapement was originally fitted, and later removed by Victor Kullberg who substituted a standard lever escapement that would fit in the space available. The engraved inscription could men have been added to the back plate and the frame regilded. This would also account for the shallowness of the engraving of the original inscription. The gilding on the balance cock and fourth cock a different colour to the rest.
- Not on display
Latest: 3 (2017)
3 (Dec 1994)
- Acquisition date
- Acquisition notes
- Following the successful acquisition of the celebrated Ilbert collection of clocks (1958,1006 collection), prints and other related materials made possible by the generous donation of funds by Gilbert Edgar CBE Ilbert's watches were then acquired using funds provided by Gilbert Edgar, public donations and government funds.
- Britain, Europe and Prehistory
- Registration number
- Additional IDs
Previous owner/ex-collection number: CAI.1150 (Ilbert Collection)