Blancpain Bathyscaphe Quantième Complet Phases de Lune

Blancpain's Bathyscaphe Quantième Complet Phases de Lune, reference 5054 3640 76S, has a 43 mm case in red gold. The case measures 13.4 mm thick, and the lug width comes in at 23 mm. A sapphire crystal covers the sunburst blue dial, which sits above the self-winding calibre 6654.P.4 and its 72-hour power reserve. This is a complete calendar watch, showing date, weekday and month alongside a moon phase display and central seconds. The gold strap closes with a folding clasp, matching the tone of the case. Blancpain rates the case to 300 metres, a reassuring figure for a dress watch built on dive-watch foundations.