Speedmaster Moonphase Speedmaster Professional Moonphase (White Gold) 3689.30

18k white gold Speedmaster Professional MoonphaseMoon-phase displayAn astronomical indication showing the Moon’s changing appearance through its cycle, averaging about 29.5 days. Display accuracy and the interval between corrections depend on the mechanism; a maker’s specification for one calibre should not be applied to every moon-phase watch. introduced at Basel 1999 for the 30th anniversary of Apollo XI: blued hands, metallic blue moon disc, caliberCaliberThe designation of a watch movement, identifying its design or movement family. 1866, “First Watch Worn On The Moon” caseback; leather strap only.