Charming Swiss yellow gold square pendant watch Circa 1990

Gold watch with black dial
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A Swiss 18K yellow gold square pendant watch, circa 1990. A solid, polished case, engraved case back with four screws, engraved bezel, cabochon sapphire-set crown, and sapphire crystals. Black enamel dial with diamond indexes and yellow gold baton hands. Rhodium-plated movement, Geneva striping decoration, 21 jewels, straight-line lever escapement, cut bimetallic balance, self-compensating flat balance spring. Case and movement signed.
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Thickness: 13 mm
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Diameter: 50 mm
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Signed: Corum  Swiss
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Corum: In 1955, René Bannwart and Simone Ries founded this company in La Chaux-de-Fonds and specialized in extravagant wristwatches with mechanical and quartz movements. Corum only makes high-priced watches but does not manufacture its movements, so it is not a manufacturer. The company sourced its movements from ETA and Frederic Piguet, among others, before the latter was fully integrated into the Blancpain brand and became its exclusive supplier. Parmigiani manufactures the linear movements of the Golden Bridge. Corum is known for unusual design ideas.