Brand UNITAS Caliber 491 Size 16 1/2x17 3/4 Function Version Hands 1,15x2,00 Stem 7921 Stem (subs.) Stem (2 pce) Balance staff 30214 Balance staff (subs.) 31211 Mainspring (subs.) 1,3x14,0x0,18 Mainspring (subs.) Battery