A silver pair-cased pocket watch, maker I. Perkinson English Circa 1803 4.8 cm diameter, 6.7 cm high, 5.7 cm case diameter. A silver pair-cased pocket watch, maker I. Perkinson. English Circa 1803. Silver pair-cased Watch, outer case and inner case both plain, both hallmarked. London for 1803. Makers mark "GS"' possibly George Swan of 42 St. John's. Square, London who is listed as a watch case maker, and whose mark entered on. 19/4/1,800. White enamel dial (chip to enamel middle of dial), black Roman hour numerals, mis-matched hands. Bullseye-glass. Long round pendant, stirrup bow. Fusee drive, verge escapement. Pierced table of cock with symmetrical foliate. pattern, solid chased foot and surround, with finger indication to silver regulation. disc. Signed on the back plate "I Perkinson, 2620, London". Reference: There is no entry in Britton for a Perkinson at all. Provenance: Purchased from a Mr. Steiner of Sydney for $75 in about 1969. Dimensions: 4.8 cm diameter, 6.7 cm high, 5.7 cm case diameter