HATTORY-SEIKO 8V20 Brand HATTORY-SEIKO Caliber 8V20 Size Function Version Hands Stem Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery Watchparts Part NocaliberdescriptionoriginalArtno..8V20MAIN PLATE(PLASTIC)01000449840100044.8V20CENTER WHEEL BRIDGE01210799840121079.8V20TRAIN WHEEL BRIDGE01250489840125048.8V20CENTER WHEEL AND PINION02210289840221028.8V20FOURTH WHEEL AND PINION02410709840241070.8V20Hour wheel02710869840271086