Cortebert Sport Triple Calendar Moonphase Switzerland, circa 1950s Manual movement, caliber 677, 15 jewels; hours, minutes, seconds, date, day, month, moonphase Matte Silver guilloché subdial dial with printed black and gold Arabic numeral hour-markers, constant seconds subdial, day, month, and moonphase apertures, date outer ring; Gold Feuille hands and silver w/ red Pyramid tip date hand 18kt Yellow Gold case, crown, correctors, and snap-on caseback Hadley Roma navy blue shrunken leather strap with gold pin buckle Hallmarked on the case and inner caseback w/singed crown Case No. 2271783 Case Measurements: Diameter: 35mm Lug to lug: 42mm Thickness: 11mm Lugs: 18mm Good age-related condition with minor traces of wear, dial shows age-related patina and some wear on the date track.