Brand UNITAS Caliber 439 Size 18 1/2x21 Function Version Hands 1,15x2,00 Stem 12003 Stem (subs.) Stem (2 pce) Balance staff 40704 INCA Balance staff (subs.) 41501 SSR Mainspring (subs.) 2,0x16,5x0,20 Mainspring (subs.) Battery