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Signed Vulliamy, London and numbered on the backplate 873, the clock incorporated a detached lever escapement, compensation curb, alarm and pull repeat, and arrived at auction in its original carrying case.

A record in Vulliamy’s workbooks, preserved in the British Horological Institute and shown here, shows that the clock cost Yarborough £33 2s 1d. At Duke’s it cost £28,000 (plus 15 per cent premium and VAT).