Swiss gilt open faced Art Nouveau chronograph Circa 1907

Gilt chronograph by Longines
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An interesting and rare Swiss gilt open faced Art Nouveau chronograph pocket watch, circa 1907. Retailed by Wittnauer, USA. Chronograph with 30-minute counter. White enamel Art Nouveau dial with black Arabic hours and red Arabic minutes, subsidiary seconds, blued steel hands. Plain case, monogram on the back. Case numbered, dial signed, movement signed and numbered.
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Diameter: 52.5 mm
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Weight: 109 g
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Signed: Longines