Blancpain Villeret Quantième Annuel GMT

Blancpain's Villeret Quantième Annuel GMT, reference 6670 1542 55B, is a GMT watch cased in white gold at 40 mm. The case measures 11.1 mm thick, with lugs set at 22 mm apart. A sapphire crystal covers the opaline dial, which sits on a self-winding movement, calibre 6054F.4, running with 72 hours of power reserve. The watch combines an annual calendar with a second time zone display, alongside date and central seconds functions. Such a pairing of complications keeps the case relatively slim despite its mechanical complexity. An alligator leather strap closes with a folding clasp. Blancpain rates the case to 30 metres of water resistance.