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Lot Essay
With Uhrenmuseum Glashütte Certificate dated 14 July 2010 and copies from the registers confirming the sale of the present watch to the Kriegsmarinewerft, Kiel, on 29 December 1941 for the amount of 250 Reich Marks.
As of 1941, A. Lange & Söhne began the production of their calibre 48 watches, starting with serial number 200'000. These movements had to be highly accurate with a daily deviation of less than one second, comparable to the requirements for marine chronometers, and were tested by the German Naval Observatory. The balances used were the proved nickel-steel-guillaume version, already successfully tested in other observation watches.
For a description of calibre 48 and illustration of the models see A. Lange & Söhne - eine Uhrmacher-Dynastie aus Dresden by Reinhard Meis, pp. 218-219 and Military Timepieces by Konrad Knirim, pp. 221-225.
As of 1941, A. Lange & Söhne began the production of their calibre 48 watches, starting with serial number 200'000. These movements had to be highly accurate with a daily deviation of less than one second, comparable to the requirements for marine chronometers, and were tested by the German Naval Observatory. The balances used were the proved nickel-steel-guillaume version, already successfully tested in other observation watches.
For a description of calibre 48 and illustration of the models see A. Lange & Söhne - eine Uhrmacher-Dynastie aus Dresden by Reinhard Meis, pp. 218-219 and Military Timepieces by Konrad Knirim, pp. 221-225.