A silver open-faced watch Circa 1839 5 cm diameter, 5.7 cm high. A silver open-faced watch. Circa 1839. Silver open-faced watch. Plain back cover, short round pendant and round bow. Case bears. London hallmarks for 1839 and the makers mark "GH", probably George Hammon whose. incuse marks were entered in 1828 when he was at 2 Merideth Street and again in 1834 when. he moved to 4 Skinner Street, Clerkenwell. He is listed as a casemaker. Winds through the. back of inner case. White enamel dial with black Roman hour numerals. Subsidiary seconds dial. Gold spade. hands. Fusee drive lever escapement. Narrow solid balance cock, chased with floral design on foot. and table, diamond end stone. Three arm steel balance. Movement not signed, bears the. number 5002 and the words "Slow and Fast" near the regulator dial. Brass dust cover. Dimensions: 5 cm diameter, 5.7 cm high