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Rare original A. Lange & Söhne winder box for Langematik Perpetual 18K YG watch, Ref. 310.021. The box is in a great condition, winding feature is working properly. Outer box and International warranty card for the watch are also included.
This is a winder with 10 settings/programs. Lange recommends using Position #1 (lowest setting) on this winder for their Langematik movements. In that Position #1, the winder runs for 5-1/2 hours per day (840 revolutions per day), Position #9 runs for 9-1/2 hours per day (1450 revolutions per day), and Position #10 runs constantly for 24 hours per day (3670 revolutions per day).
Dimensions: 23 x 19 x 18 cm, weight is more than 5 kg!