Thomas Mercer, Eyood Rd, St. Albans, Great Britain marine chronometer, 2 day, time only, spring driven movement with Earnshaw spring detent escapement in a nickel plated housing with silvered dial. This is a very unusual and scarce model with electrical

Thomas Mercer, Eyood Rd, St. Albans, Great Britain marine chronometer, 2 day, time only, spring driven movement with Earnshaw spring detent escapement in a nickel plated housing with silvered dial. This is a very unusual and scarce model with electrical contacts to drive slave units, a start / stop mechanism to regulate exposed balance and a nickel plated keyhole cover, s#15030 c1939 good running order (winds and ticks) and the wind indicator functions. The nickel plated finish on the housing is in excellent condition. The three screws to secure movement to housing and the cover are absent. The silvered dial has oxidation. Diameter 6"