HATTORY-SEIKO 7439A Exploded diagram BrandHATTORY-SEIKOCaliber7439ASizeFunctionVersionHandsStem354-076Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.4000Electronic module4001416984040014164060Coil -red400249598404002495