HATTORY-SEIKO 7122A Exploded diagram BrandHATTORY-SEIKOCaliber7122ASizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.242BCannon pinion with driver270-02398402700234000BElectronic module4001-1120259984060BCoil -red4002-01098404002010