This is the Blancpain Villeret Semainier Grande Date 8 Jours, a classic dress watch with useful functionality: number of the week indication
Movement Blancpain 3738G2 | Automatic | Diameter: 32 mm | Thickness: 7.85 mm | Parts: 378 | 3 mainspring barrels | Hours, minutes, seconds, day, date, week | Power-reserve: 8 days
Movement Blancpain 3738G2