Brand ZENITH Caliber 405B Size 13 1/4 Function SC-CLD-AUT-CHR-Flyback Version EL PRIMERO Hands Stem 5824 Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) 1.22x12.5x0.146 AUT Mainspring (subs.) Battery