HATTORY-SEIKO 7820ABrandHATTORY-SEIKOCaliber7820ASizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4060Coil -red4002-781025998