HATTORY-SEIKO 8N51BrandHATTORY-SEIKOCaliber8N51SizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4018N51Winding stem035138898403513884018N51Winding stem03513849840351384.8N51MAIN PLATE(PLASTIC)01003879840100387.8N51TRAIN WHEEL BRIDGE01253969840125396.8N51FOURTH WHEEL AND PINION02414369840241436.8N51CENTER MINUTE WHEEL02704369840270436.8N51Hour wheel02714359840271435.8N51Setting lever03833879840383387.8N51BACK PLATE89940095