Brand UNITAS Caliber 281 Size 18 1/2-21 Function Version Hands 1,15x2,00 Stem 9026 Stem (subs.) Stem (2 pce) Balance staff 35803 Balance staff (subs.) 37001 SSR Mainspring (subs.) 1,5x17,0x0,21 Mainspring (subs.) Battery