German chronometer with 56 hour power reserve Circa 1940

Brass marine chronometer in box
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A fine German, two day marine box chronometer with 56 hour power reserve sector, circa 1940. Beach with glazed top, gimbaled brass bowl with screw down glazed bezel, gimbal ring locked by swivelling arm mounted in the front right corner. Silvered dial with Arabic hour numerals, subsidiary seconds at 6 o’clock and up and down indicator at 12 o’clock. Gold Spade hands. A brass full plate movement with turned pillars secured by screws, fusee and chain, Harrisons maintaining power, Earnshaw spring detent escapement, cut bimetallic compensation balance with four circular mean time weights and two temperature nuts, free sprung helical balance spring with outer terminal curves. Dial, case and movement signed and numbered.
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Dimensions box: 18 × 18 × 18 cm
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Signed: A. Lange & Söhne  Glashütte b/Dresden