Russian rare silver deck watch with chronograph Circa 1915

Open faced pocket watch by Henri Moser
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A Russian very rare silver deck watch with chronograph Circa 1915.
Solid silver case, signed and numbered and with Swiss and Russian silver punch; white signed enamel dial with Arabic numerals, sunk subsidiary dial for the seconds, 30min counter, blued steel Breguet hands and a single-button chronograph with 1/5 seconds register; precision lever movement with chronograph.
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Diameter: 56.5 mm
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Weight: 126 g
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Signed: Hy Moser & Cie