AS 1657BrandASCaliber1657Size7FunctionSC-AUTVersionHands0,75x1,20Stem5529Stem (subs.)Stem (2 pce)Balance staff23601Balance staff (subs.)25601 INCAMainspring (subs.)1,3x6,0x0,06Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8025529723Balance staff, pivoted80225601723Balance staff ST -shock-absorber80223601