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In-house manufacture caliber · caliber Urwerk Caliber UR 12.01 (self-winding, Zenith Elite base movement fitted with Urwerk's wandering-hours satellite module, ARCAP baseplate, windfänger air-turbine rotor regulator, 48-hour power reserve)
Medium-large: suits wrists 6.5 in+ (16.5 cm+)
41 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.
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Limited to 25 pieces; the three-satellite wandering-hours carousel and the two astronomical distance pointers on the periphery of the dial must all track correctly for the piece to be genuine and functioning.
Known issues in the market
Limited edition of 25 pieces delivered in Q4 2019; provenance and Urwerk extract of archives should be checked for any secondary-market purchase.
The case looks like titanium but the base SpaceTime reference is steel or PVD-coated titanium -- an example that feels unusually light or heavy for its stated material should be checked against the Urwerk archive.
Area
What to check
What is correct
Red flag
dial
Satellite carousel sequence and astronomical pointers
Three rotating hour satellites advance in sequence; after each hour the red minute pointer hands off correctly to the equatorial/orbital distance scales at 10 and 2 o'clock
Non-advancing or out-of-sequence satellites; distance pointers not tracking the minute display; movement fault
caseback
Cal. UR 12.01 architecture and windfänger rotor
Perforated rotor with visible windfänger (air-trap) propeller wheel regulating rotor spin, over a Zenith Elite base
Missing or non-functional windfänger; rotor architecture inconsistent with UR 12.01
