HATTORY-SEIKO 8N21BrandHATTORY-SEIKOCaliber8N21SizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4018N21Winding stem035138498403513844018N21Winding stem03513889840351388.8N21MAIN PLATE(PLASTIC)01003879840100387.8N21TRAIN WHEEL BRIDGE01253969840125396.8N21FOURTH WHEEL AND PINION02414369840241436.8N21CENTER MINUTE WHEEL02704369840270436.8N21Hour wheel02714359840271435.8N21Setting lever03833879840383387