857 UTC
A hardened pilot watch built around the useful second time zone, not travel glamour.
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Story & heritage
The 857 UTC extends Sinn’s aviation-watch language with a second time zone. It is a clear example of the Lothar Schmidt-era Sinn: legibility remains central, but the watch is defined by proprietary case hardening and magnetic-field protection rather than nostalgia.
WatchBuys lists the 857 UTC as an automatic winding watch with second time zone; Sinn positions the model among hardened pilot instruments.
Materials & craft
The model uses a fully TEGIMENTED case, sapphire crystal, screw-fastened back, Ar-Dehumidifying Technology and magnetic-field protection. The UTC hand adds a practical second time zone without crowding the dial.
How to choose & style
The 857 UTC is for frequent travel without polished GMT theatrics. The matte case and restrained dial work best on textile or leather; bracelet versions make it feel almost military.
