A Longines stainless steel cased keyless wind open-faced split seconds chronograph pocket stopwatch, circa 1973, Ref. No. 8350, the signed jewelled movement numbered '50918018' and '262', the signed two tone silvered dial with black Arabic numerals, subsidiary dials for constant seconds and 30 minute register, and nonius-slide for 1/10th of a second, the case back numbered '50918018' over '8350', case diameter 6.6cm. Note: Longines were the official timekeepers for the summer and winter Olympic Games from 1952 in Oslo to the Moscow Games of 1980. The 262 calibre movement was introduced in 1966. These stopwatches were the pinnacle of Longines professional timing. They were kept by the factory and lent out for all types of events, including the Olympics and the water and land speed record attempts of Donald Campbell's 'Bluebird'.