Swiss rare 18 carat gold duplex watch with visible balance Circa 1840

Gold open faced pocket watch 
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A rare Swiss 18 carat yellow gold open faced key winding pocket watch with visible balance and decentralized time indication made by André Brunet in Geneva, circa 1840. The case is taille douce (fine cut) engraved with a vermicelli motif and flowers on the back. The white enamel dial features decentralized time indication at 12 o’clock with radial Roman hours, outer minute divisions and blued hands, and a visible balance below. The gilded brass movement is fitted with a going barrel, duplex escapement, monometallic balance and blued steel flat hairspring. Cuvette signed.
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Diameter: 45 mm
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Signed: André Brunet
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André Brunet was a watchmaker working in Geneva from 1830 to 1850. He specialized in flat and extra flat watches, with special bridge calibers or inverted calibers, known as the Bagnolet, some with a visible balance. His watches are often decorated with enamel or intaglio engravings.