Alexander Mitchelson, London. A silver key wind pair case pocket watch with centre secondsDate: Circa 1770 and laterMovement: Gilt full plate cylinder, pierced and engraved balance cock, diamond end stone, silver regulation, round balter pillars, No.782Dial: White, black Roman numerals, black outer 1/5th second divisions with 5 minute Arabic numerals, gilt beetle and poker hands, centre secondsCase: Polished inner and outer, signed inner cap No.782, case hallmarked for 1851Signed: Movement & inner cap, inner case stamped T.WSize: 49mmFor further information on this lot please visit the