
Blancpain Villeret Semainier 6637 Week Calendar
The Blancpain Villeret Semainier 6637 is the brand’s first wristwatch to feature a week-of-the-year display. Around the outermost ring of the grand feu enamel dial, numerals 1–53 indicate the weeks of the year, providing a poetic reminder of time’s passage and a practical way to plan weekly activities. This design merges functionality with the classic aesthetics of the Villeret collection.
The detailed dial features Roman numeral hour markers, hollow leaf-shaped hands, and a curved blued-steel hand pointing to the current week. The day-of-the-week subdial sits at 9 o’clock, while the date display is at 12 o’clock. Users can estimate the month based on the week hand position relative to the 12-hour scale, as in the example reading Friday, May 31st, Week 21.
Adjustment is intuitive: the week indicator is set via a hidden corrector at 1 o’clock, the day-of-the-week via a corrector at 11 o’clock, and the date using the crown. The watch is powered by the in-house Caliber 3738G2 automatic movement with three series-coupled mainspring barrels, delivering an impressive 8-day power reserve. Wearing the watch once or twice a week is sufficient to keep it fully wound.


Specifications — Blancpain Villeret Semainier 6637
- Dial: Grand feu enamel with Roman numerals, leaf hands, and blued-steel week hand
- Functions: Week of the year, day, date
- Movement: Blancpain Caliber 3738G2 automatic, 3 barrels, 8-day power reserve
- Case: Typical Villeret design in gold or steel
- Adjustments: Hidden correctors for week (1 o’clock) and day (11 o’clock), crown for date
For more on Blancpain’s innovative calendar watches, visit the official Blancpain website or check our Blancpain collection for reviews and technical details.