A TWO DAY MARINE CHRONOMETER, the matt-silvered dial signed Chronometer-Werke G.M.B.H. Hamburg No.640, Roman numerals, subsidiary seconds and vector up-and-down dials,blued steel seconds hand, yellow metal hour, minute and up-and-down hands, reversed fusee, cut bi-metallic guillaume balance, four round heat compensation weights, blued steel helical balance spring, flat spring detent, to side of banking block, brass bowl and gimbal, plain 3-tier mahogany box, external drop handles, Chronometer-werke trade label to front of middle section - 7¼in(19cm)square