Brand ROLEX Caliber 3130 Size 12 1/2 Function SC-AUT Version Hands Stem 802 5116 Stem (subs.) = 3135 Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) 1.16x11.2x0.112 AUT Mainspring (subs.) 820 2825 0 Battery