A late 19th Century Swiss 18ct. gold half-Hunter case keyless lever chronograph pocket watch, the Swiss movement signed 'Smith & Son, London, Watchmakers to the Admiralty', the white enamel dial with Roman numerals, subsidiary seconds, sweep centre seconds and elapsed minute recording dial, the centre seconds operated by a single button in the band, the case with blue enamel chapter ring and engraved crest and motto, with a curb-link watch chain attached.