Swiss 18K yellow gold open faced pocket watch Circa 1980

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A very fine, thin Swiss, 18K yellow gold dress pocket watch, circa 1980. A solid, polished case, white enamel dial with painted radial Roman numerals, outer minute divisions, subsidiary guilloche seconds dial. Black Breguet hands. A gilt brass movement, Geneva striping decoration, 19 jewels, straight-line lever escapement, monometallic balance adjusted to five positions, shock absorber, self-compensating Breguet balance spring, index regulator. Dial, case and movement signed.
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Thickness: 7 mm
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Diameter: 46 mm
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Signed: International Watch Co.  Schaffhausen
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The dial and movement are as new.