Brand OTERO Caliber 581 Size 9 3/4 Function Version Hands 0,65x1,00 Stem 5617 Stem (subs.) Stem (2 pce) Balance staff 28507 (neu) Balance staff (subs.) 27507 (alt) Mainspring (subs.) 1,20x7,00x0,085 Mainspring (subs.) Battery