Blancpain, Classic series, model: 6639-3431-55B, PT950 platinum material, 42mm diameter, full calendar moon phase function, Grand enamel dial, playful face moon phase, small seconds hand, equipped with the Cal.6639 automatic movement of the same name as the watch, with the support of double mainspring barrels, the power reserve reaches 192 hours for 8 days. The movement is extensively polished with Geneva stripes and fish-scale patterns, and the edges of the parts are chamfered. It features a rose gold rotor. The hidden adjustment mechanism is concealed behind the lugs. Four buttons correspond in sequence to the day of the week, month, calendar and moon phase, and the folding clasp. Blank warranty card for all accessories.