Patek Philippe Complications Moon Phases 7121/200G-001 manually wound mechanical watch features a 33mm 18k white gold case with diamond bezel surrounding a blue sunburst dial on a shiny blue alligator strap with an 18k white gold tang buckle. Functions include hours, minutes, small seconds, and moon phase. This watch is powered by the mechanical movement Caliber 215 PS LU. This watch is water-resistant to 30m.