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Details
A mid-20th Century two-day marine chronometer by Mercer
Thomas Mercer No.21638: circa 1956
The silvered dial signed and numbered Thomas Mercer 21638, Roman hour numeral, subsidiary seconds and up-and-down dials, blued steel hands, matt gilt frames, Earnshaw escapement, cut bimetallic balance (defective top pivot) with cylindrical heat compensation weights, palladium helical balance spring, Mercer flat strip-steel detent with jewelled locking pallet, brass bowl, gimballed in light mahogany plain two-tier box with glazed top, external brass drop handles, diall diam -- 100mm.; box 190 x 195 x 170mm.
See illustration
Thomas Mercer N
The silvered dial signed and numbered Thomas Mercer 21638, Roman hour numeral, subsidiary seconds and up-and-down dials, blued steel hands, matt gilt frames, Earnshaw escapement, cut bimetallic balance (defective top pivot) with cylindrical heat compensation weights, palladium helical balance spring, Mercer flat strip-steel detent with jewelled locking pallet, brass bowl, gimballed in light mahogany plain two-tier box with glazed top, external brass drop handles, diall diam -- 100mm.; box 190 x 195 x 170mm.
See illustration