Thanks for your thoughts and reactions to the Urwerk watches. Alternative ways of time telling, not using traditional two hands, go back hundreds of years and while many companies, like AP, have dabbled I think it is true to say that Urwerk have made an art form out of it! Or certainly a consistent design theme across their watches.
And you are right that it takes one idea to resonate across the horological community and you see other watchmakers and companies building on designs or finding inspiration.
In addition to the complimentary Power and Efficiency displays, remember that the Efficiency display works in conjunction with the variable automatic winding. Yo can calibrate the winding to match your level of activity. Another benefit of this is that you are not allowing the automatic rotor to spin unnecessarily and thus reducing wear on this mechanism.
The Efficiency display also provides the same psychological impetus that a pedometer does - it encourages you to move away from your desk or out of the armchair to increase your measured activity.
Regarding the "Full", "Reduced" and "Stop" positions for the air turbine rotor damping system, I believe it is just the three positions rather than being continuously variable, but I am happy to be corrected. "Stop" will stop the automatic winding completely and turn the UR-210 into a manual wind watch. "Reduced" will decrease the winding efficiency by 20% and "Full" will allow the rotor to spin unhindered.
Regards
Andrew
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