Swiss 18 carat gold open faced complicated watch Circa 1968

Gold perpetual calendar split seconds chronograph
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A Swiss yellow gold perpetual calendar split seconds chronograph watch with registers, moon phases and leap year indication, Peter Meister Soleure circa 1968. Manual winding lever movement, 26 jewels.
White dial, applied baton indexes, subsidiary dials for 30-minute register combined with month and leap year indication, day, date and constant seconds combined with moon phases, 18k yellow gold case, chronograph activated through the crown, split second chronograph pusher snap-on back, case, dial and movement signed.
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Diameter: 52 mm
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Signed:  Peter Meister Soleure
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Possibly a school watch since Soleure is the name of a city and canton in Switzerland with a renowned watchmaking school.