1851 Great Exhibition: Official Catalogue: Class X.: Cousens and Whiteside
From Graces Guide
86. COUSENS and WHITESIDE, 27 Davies Street, Berkeley Square — Inventors and Manufacturers.
A sporting watch, the novelty of which consists in its determining the time to one-sixth of a second, by means of an independent hand acting from the centre, and detached from all the other hands, with stopping and starting springs. It has a detached lever escapement, is jewelled in 14 holes, and is particularly adapted for racing and other purposes. It may be considerably reduced in size.
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