Brand ETA Caliber B99.501 Size 16 1/2 Function SS (6) ( 21.000) Version 21.600 Hands 1.15x2.00x0.27 Stem 9026 Stem (subs.) Stem (2 pce) Balance staff 35706 INCA Balance staff (subs.) Mainspring (subs.) 1,50x14,5x0,17 Mainspring (subs.) 04307 Battery