HATTORY-SEIKO 2220A Exploded diagram BrandHATTORY-SEIKOCaliber2220ASizeFunctionVersionHandsStem351-221Stem (subs.)351-222 (lang)Stem (2 pce)Balance staff315-221Balance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.415Ratchet wheel285-2209840285220425Click381-2209840381220