AS 1639 Brand AS Caliber 1639 Size 6 3/4x8 Function AUT Version Hands 0,60x1,20 Stem 5403 Stem (subs.) Stem (2 pce) Balance staff 26003 Balance staff (subs.) 26704 INCA Mainspring (subs.) 1,5x6,0x0,06 Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8025403723Balance staff ST -shock-absorber80226003723Balance staff, pivoted80226704771BMainspring AUT sliding attachemnet920007711639