ISA 309.31BrandISACaliber309.31Size10 1/2FunctionSC-D(3)VersionHands0.70x1.20x0.20Stem= 389 (eigen)Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)Battery397MovementsArtno.brandcaliberSizehandsfunctionspecial166980ISA309.3110 1/20.70x1.20x0.20SC-D(3) WatchpartsPart NocaliberdescriptionoriginalArtno.2557/1BDoubel-toothed hour wheel