LONGINES 5851BrandLONGINESCaliber5851SizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.203= 2640Third wheel920002032640410= 2640Winding pignon920004102640721Balnace cplt. -for shock-absorber954007215741