Gubelin Ipso-Matic

Gübelin Ipso-Matic triple calendar moonphase wristwatch from the 1950s, featuring a 37.5 mm 18k gold case with a screw-down caseback. The champagne dial displays painted Roman numerals, day and month apertures at 12 o'clock, a pointer date, and a moon phase indicator at 6 o'clock, signed Gübelin Perpo-Matic. It is powered by the automatic caliber 693.