Brand T.E. (TECHNIC EBAUCHES) Caliber 73A Size 5 1/2 Function Version Hands 0,50x1,00 Stem 5537 Stem (subs.) Stem (2 pce) Balance staff 28214 Balance staff (subs.) 28810 Mainspring (subs.) 1,4x6,0x0,065 Mainspring (subs.) Battery