Original Balance Staff ETA Caliber 2890 2892-2 2892 Part number 723
ETA Mainspring self lubricating automatic non magnetic Swiss Made Nivaflex interchangeable with the following calibers:
ETA 2890, 2892, 2892-2, 2892A2, 2893, 2893-2, 2894, 2895
ETA 2892 2892-2 Sweep Second Wheel Original part # 227 Height 4.86mm
ETA 2892 watch repair parts. Shop our large selection of Original ETA mechanical watch repair parts, we carry mainsprings, stems, staffs, balance, wheels, pinions, levers, springs, screws, ratchet, palet fork and other parts.