Speedmaster Calendar 175.0034

1990s 39 mm automaticAutomaticA mechanical movement wound by a rotor as the watch moves on the wrist. Speedmaster with triple calendarComplete calendarA calendar displaying the day of the week, date and month. It needs manual correction after months shorter than 31 days because it does not automatically account for their different lengths. Often accompanied by a moon-phase display, which is a separate indication. Also called a full or triple calendar., caliberCaliberThe designation of a watch movement, identifying its design or movement family. 1150.