Highly unusual Swiss silver fan shaped pocket watch Circa 1903

Silver watch with retrograde hours and minutes
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A fine and highly unusual Swiss silver fan shaped keyless pocket watch with retrograde hours and minutes, circa 1903. The fan shaped, polished case with a cast and chased scene of a kissing couple on the back. A hinged silver cuvette. White enamel dial, Arabic hours from 0 to 12, minute divisions above with black and red five minute numerals from 0 to 60 for the retrograde indication of the hours and minutes, blued steel spade hands. A gilt brass fan shaped movement, 15 jewels, a straight line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring and an index regulator. Dial and cuvette signed Sector Watch, movement signed Record Watch Co SA Tramelan.
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Dimensions: 60 x 53 mm
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Signed: Record Watch Co SA Tramelan
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This type of watch is based on Swiss patent No. 27.961, which Giovanni Sgherlino from Turin received on April 9, 1903. A group of watchmakers and dealers from Tramelan and Tavannes took an interest in the unusual design and registered the Record Watch Co. S.A. on December 16, 1903. The new company was based in Tramelan.