HATTORY-SEIKO 17A Exploded diagram BrandHATTORY-SEIKOCaliber17ASizeFunctionVersionHandsStem351-170Stem (subs.)Stem (2 pce)Balance staff315-251Balance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.710Pallet fork -pinion 1 lower end-piec.9840310170