Swiss gold two-train and two-time zone watch Circa 1975

Gold open faced watch with twin balances
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A Swiss pink gold two-train and two-time zone open faced watch with twin balances, circa 1975, gilt brass parallels geartrain lever escapement movement, two cut-bimetallic compensation balances visible from the dial with regulation screws and cylindrical springs.
White enamel dial with two subsidiary dials, one with Roman numerals and outer minute track the other with Turkish numerals and outer minute track, 18k pink gold engraved cuvette, 18k pink gold polished case, cuvette and dial signed.
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Diameter: 53.5 mm