ETA E20.331 Exploded diagram Brand ETA Caliber E20.331 Size 13 1/4 Function ANA-DIGI Version Hands Stem = E20.301 Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.119E20.321Combined bridge92000119E2034405E20.321Battery connection92004405E2034418E20.321Kontaktfeder Drücker92004418E203