Swiss gold watch with full calendar and moon phase Circa 1973

A limited edition open faced gold pocket watch
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A Swiss pocket watch in practically new condition, with a full calendar and moon phase, circa 1973. It is a limited edition, no. 24 of 100 pieces.
This watch consists; a 18 carat gold case with glazed movement, a signed silvered dial with radial Roman hours, sunk day-, date- and month indication and moon phase. It has a bridge movement and a Glucydur screw balance.
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Diameter: 56 mm
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Weight: 171 g
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Signed: International Watch Co., Schaffhausen