Silver pair-cased, spring detent escapement deck-watch by Thomas Earnshaw. White enamel dial with a subsidiary seconds dial and inscribed 'Thomas Earnshaw Invt et Fecit No.58'. The movement is signed 'Thos. Earnshaw London Invt. et Fecit. no 1514’ and has a two-arm bi-metallic compensation balance with wedge weights. (Earnshaw’s double numbering system is not understood). Hallmarked 1791-2.
This watch was used for navigation by Capt. George Vancouver (c.1755 – 1798) on board HMS Discovery, during his famous voyage surveying the West Coast of America (1791 – 5).
Clockmakers Museum No. 427
- Object Number:
watch: 67 mm x 49 mm x 23.5 mm,
outer case: 59 mm x 57 mm x 19 mm,
- Lent by the Worshipful Company of Clockmakers
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