ISA 309.31 Brand ISA Caliber 309.31 Size 10 1/2 Function SC-D(3) Version Hands 0.70x1.20x0.20 Stem = 389 (eigen) Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery 397 MovementsArtno.brandcaliberSizehandsfunctionspecial166980ISA309.3110 1/20.70x1.20x0.20SC-D(3) WatchpartsPart NocaliberdescriptionoriginalArtno.2557/1BDoubel-toothed hour wheel
