Blancpain Villeret Quantième Annuel GMT

Blancpain's Villeret Quantième Annuel GMT, reference 6670A 3642 MMB, is a GMT watch with a 40 mm red gold case. The case measures 11.1 mm thick, with lugs spaced 22 mm apart. A sapphire crystal covers the opaline dial. The self-winding calibre 6054F.4 combines an annual calendar with a GMT function, date and central seconds, and stores 72 hours of power reserve. The watch is fitted to a Mille Mailles strap secured by a folding clasp. Water resistance is modest: the case is rated to 30 metres, enough for everyday wear but not for diving.