A 19th Century Two-day Marine Chronometer, the silvered dial signed French, Royal Exchange London No 5284, Roman hour numerals, blued steel hands, subsidiary seconds and up-and-down dials, convex glass, movement top-plate finely engraved French, Royal Exchange London No 5284, Earnshaw escapement, dovetail spring detent to side of banking block, later third wheel, cut bi-metallic balance, segmental heat compensation weights, blued steel helical balance spring, brass bowl and gimbal in replacement 3-tier brass-bound rosewood case with flush recessed handles -- box 6½in (160mm) square (approx)

細節

A 19th Century Two-day Marine Chronometer, the silvered dial signed French, Royal Exchange London No 5284, Roman hour numerals, blued steel hands, subsidiary seconds and up-and-down dials, convex glass, movement top-plate finely engraved French, Royal Exchange London No 5284, Earnshaw escapement, dovetail spring detent to side of banking block, later third wheel, cut bi-metallic balance, segmental heat compensation weights, blued steel helical balance spring, brass bowl and gimbal in replacement 3-tier brass-bound rosewood case with flush recessed handles -- box 6½in (160mm) square (approx)
(See illustration)