217QRS White GoldReference# 217QRS White Gold Blue
- Limited Edition: 10 pieces in 18-karat white gold
- Case: 18-karat white gold
- Size: 39mm
- Movement: hand-wound caliber, made in-house
- Function: retrograde date
- Power Reserve: approximately 65 hours
- Dial: blue guilloché center
- Caseback: sapphire crystal
- Strap/Bracelet: alligator leather
The 217QRS features a retrograde date mechanism of a unique construction where it is fully integrated in main plate. Setting the date cannot be easier. One press makes the date hand advance one day. A special mechanism has been created for the return of the date of 31 to 1, allowing the date to return slowly back to the 1st. By doing this, the mechanism avoids bouncing or arriving at the first day.
The movement has a very large balance wheel manufactured in-house, permitting perfect regulation of the watch to within strict tolerances. To equip such a rare timepiece, a very rare and unique balance-spring system has been used. The exterior of the spring uses a typical Phillips overcoil, while the internal curve uses the Grossmann curve.
The escapement makes this movement special; This is the first watch to have two wheels in such a configuration. The escape wheels give a direct impulse to the balance through the impulse roller / jewel. This retreat is extremely efficient and requires much less energy than traditional leisurely retreats, providing benefits in terms of longevity and stability in day-to-day use.
The balance-wheel bridge is sublimely elegant, offering an unimpeded view of the escapement and balance. It also allows the enthusiast to admire the synchronized movements of the escapement wheels.
The in-house movement inspired from Vingt-8 is designed, built, fabricated, finished and assembled in its entirety in Voutilainen workshops. The design and philosophy of the movement combines respect for longevity and precision with classical watchmaking tradition.