Brand UNITAS Caliber 289 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 SSR Mainspring (subs.) 1,3x14,0x0,17 Mainspring (subs.) Battery