A two day mahogany marine chronometer, Thomas Mercer, 27212, 1950's,
silvered dial signed and numbered Thomas Mercer, 27212, Arabic numerals, subsidiary seconds and up-and-down dials, blued steel hands, gilt fusee movement (fusee chain detatched) with Earnshaw escapement, spring foot detent, cut bimetallic balance with cylindrical heat compensation weights, white metal helical balance spring, gimballed in patinated brass bowl, two tier mahogany box with glazed top,
dial diam. 10cm, 18.5cm. box.