HATTORY-SEIKO 8N51 Brand HATTORY-SEIKO Caliber 8N51 Size Function Version Hands Stem Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery Watchparts Part NocaliberdescriptionoriginalArtno.4018N51Winding stem035138498403513844018N51Winding stem03513889840351388.8N51MAIN PLATE(PLASTIC)01003879840100387.8N51TRAIN WHEEL BRIDGE01253969840125396.8N51FOURTH WHEEL AND PINION02414369840241436.8N51CENTER MINUTE WHEEL02704369840270436.8N51Hour wheel02714359840271435.8N51Setting lever03833879840383387.8N51BACK PLATE89940095