Description: Gilt brass, full plate verge movement (35 mm diameter). Square baluster pillars. Verge escapement. Pierced cock and slide plate (cock not jewelled), steel balance lacking balance spring. The back plate signed ‘Jno Jefferys London’ and numbered ’48’. (A)
Additional Info:
Only six watches (including the two movements mentioned here) signed by John Jefferys are known, one of them is John Harrison’s own pocket watch. Jefferys was John Harrison’s most important watchmaker until Larcum Kendall (Jefferys apprentice) took over when Jefferys died in 1754. (A)
This movement has been made around the time when Larcum Kendall was taken as apprentice.
Antiquarian Horology 