HATTORY-SEIKO 4312A Exploded diagram Brand HATTORY-SEIKO Caliber 4312A Size Function Version Hands Stem 354-053 (TU) Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery Watchparts Part NocaliberdescriptionoriginalArtno.401BHandsetting stem354-05398403540534060Coil -red4002-009025998.BBatteriebügel427002098404270020