Very fine Swiss silver niëllo lever pocket watch Circa 1920

Fine silver niëllo open faced school watch
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A very fine Swiss silver niëllo open faced lever pocket watch, circa 1920. Silver niëllo case, stripe patterned, engraved gold medallion. White enamel dial with Arabic numerals, sunk center and auxiliary seconds and blued Breguet hands. Rhodium plated bridge movement, fausses côtes decoration, polished screws, screwed gold chatons, gold screwed compensation balance, blued H balance spring, index spring fine adjusting device, ruby endstone on balance and escape wheel.
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Diameter: 51 mm
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Weight: 82 g
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Signed: Ecole d’Horlogerie Soleure