Early Swiss silver former wristwatch chronograph Circa 1915

Silver lever chronograph pocket watch 
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A very early single-button silver chronograph wristwatch with register, Switzerland, circa 1915. A silver case with hinged back, manual winding, crown with single-button for release, stop and return; fine lever movement with big balance, very early chronograph caliber, enamel dial in very beautiful condition, red tachymeter scale, blued steel hands, 30min register, in good condition.
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Diameter: 35 mm
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Signed: No name