German 14K rose gold open faced keyless lever watch Circa 1920

Rose gold open faced keyless lever by Lange & Söhne
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A very fine German 14 carat rose gold open faced keyless lever pocket watch, circa 1920. Frosted gilt movement, ¾ plate, 17 jewels, straight-line Glashütte lever escapement with gold fork and escape wheel, banking with a pin and hole, cut bimetallic compensation Guillaume-type balance with temperature adjustment screws, blued steel Breguet balance spring with screw stud, swan-neck micrometre regulator. Gold hinged cuvette. White enamel dial with Breguet numerals, outer minute track, subsidiary seconds and original blued steel spade hands. Polished case. Dial, case and movement signed.
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Diameter: 52 mm
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Signed: Deutsch Uhrenfabrikation Glashütte-SA. A. Lange & Söhne