TISSOT 870BrandTISSOTCaliber870Size12FunctionVersionHandsStem6328Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)1,30x10,50x0,13Mainspring (subs.)= OMEGA 860-1208BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401= 860Winding stem860-11068026328705320Escape wheel -pinion straigt piv.320-130596503201305770Mainspring860-120896508601208