The 217QRS features a retrograde date mechanism of a unique construction where it is fully integrated in main plate. Setting the date can not be easier. One press makes the date hand one day. A special mechanism has been created for the return of the date of 31 st to 1 st, allowing the date to return slowly back to 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.
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