The Blancpain Léman Tourbillon Semainier Grande Date, introduced in 2006, features a self-winding movement with tourbillon escapement and an unusual week number indicator – paired with the more common big date, day, and power reserve functions.Reference 2925-3630-53B has a red gold case and an opaline dial, fitted with an alligator strap lined with rubber. It is a limited edition of 188 pieces.
