HATTORY-SEIKO 6138A Exploded diagram Brand HATTORY-SEIKO Caliber 6138A Size Function Version Hands Stem 354-616 Stem (subs.) Stem (2 pce) Balance staff 315-611 (29823 Boley) Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery Watchparts Part NocaliberdescriptionoriginalArtno.180Barrel with drum + cover205-5559840205555401Winding stem354-6169840354616723Balance staff ST -shock-absorber315-61180229823771Mainspring AUT sliding attachemnet401-61698404016161488Pawel winding wheel505-6130259988000BChronograph wheel ( 60s)888-61198408886118020Minute counting wheel (30m) H 747902-6110259988180BFly-back lever -zero actoon587-6119840587611