German deck watch with original box and certificate Circa 1920

Silver open faced deck watch by J. Assmann
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A fine Glashütte deck watch with original box and original certificate, circa 1920. This watch is a presentation watch for 25 years’ service with the ‘Poldi Stahlhütte’ in Kladno (CZ).
It has a silver polished case. A signed enamel dial with Arabic numerals, auxiliary seconds and blued spade hands. And a 3/4 plate movement, frosted, gilt, with gold lever and escape wheel, gold screw compensation balance and index spring fine adjusting device.
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Diameter: 55 mm
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Weight: 112 g
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Signed: J. Assmann, Glashütte i/Sachsen