German silver open faced lever with regulator dial Circa 1949

Silver open faced lever by A. Lange & Söhne
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A German silver open faced keyless lever watch with regulator dial, circa 1949. Gilt finished 3/4 plate jewelled lever movement, blued screws, bimetallic compensation balance with gold screws.  Silver cuvette. Black enamel dial, outer Arabic numeral minute indication, central minute hand, two sunk subsidiary dials for hour and constant seconds. Plain Royal case. Case, dial and movement signed, cuvette stamped.
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Diameter: 51 mm
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Signed: A. Lange & Söhne Glashütte/SA