Canon FD 50mm 1.4 Lens Works Wide Open Only

Serial Number: 1262283

It comes with a front cap.

Cosmetic Condition: 6.5/10
It shows signs of use.

Optics: 9/10
The lens has a few cleaning marks and dust specks inside.

Mechanics: Only works wide open
The lens diaphragm is stuck at 1.4. Aperture and focus rings move smoothly.