Brand UNITAS Caliber 249 Size 18 1/2-21 Function Version Hands 1,15x2,00 Stem 12003 Stem (subs.) Stem (2 pce) Balance staff 46507 Balance staff (subs.) 47003 INCA / 47201 SSR Mainspring (subs.) 2,1x17,0x0,21 Mainspring (subs.) Battery