A. Lange & Söhne, Glashütte B/Dresden, Movement No. 1240, 180 x 175 x 180 mm, circa 1940

A very fine ship's chronometer with lever escapement, 35h power reserve and seconds contact device - original key No. 1240
Case: mahogany box, applied signature shield, applied handles, with lid and facetted glass, brass gimbals and bowl No. 1240, reeded adjusting nut for external hand setting, two-body. Dial: silvered, signed, numbered, radial Roman numerals, large auxiliary seconds, gilt spade hands. Movm.: brass movement, frosted, gilt, solid circular movement pillars, barrel, polished screws, hand setting device, lever escapement, "Griesbach"-chronometer balance with 4 weights and 2 screws, blued helical balance spring, beryllium-bronze lever and escape wheel, chatoned diamond endstone on balance, electromechanical contact device.