Large German silver open faced lever pocket watch Circa 1920

Silver precision watch 
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An extremely fine and large German silver open faced lever pocket watch, circa 1920.
A precision lever movement of best quality 1A with screwed gold chatons, a gold lever, golden escape wheel and fine adjusting device. Stepped white enamel dial with Arabic hours, an outer minute track, subsidiary seconds at 6 o’clock and blued steel hands. The back of the case is engine turned in a sunburst pattern. Dial signed, case numbered, movement signed and numbered.
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Diameter: 53 mm
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Weight: 101 g
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Signed: Deutsche Präzisions-Uhrenfabrik Glashütte/Sa eGmbH
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Silver pocket watches in quality 1A are much rarer than with gold cases.