Blancpain Villeret Réveil GMT

Blancpain's Villeret Réveil GMT, reference 6640 1127 55B, has a 40.3 mm steel case, a GMT watch built around a rare complication. The case measures 12.1 mm thick, with a lug width of 22 mm. A sapphire crystal covers the white dial. The self-winding calibre 1240H drives the watch, with 45 hours of power reserve. Beyond the GMT function, the movement adds an alarm, a feature seldom found alongside date and central seconds in the same piece. The dial's date and GMT indications sit within reach of a folding clasp that secures the alligator leather strap. Water resistance is modest: the case holds to 30 metres, enough for daily wear but not for swimming.