Pentax Super-Takumar 50mm 1.4 M42 Lens 8 Elements Not Working

Serial Number: 1378011

Lens only. No Caps.

Cosmetic Condition: 8/10
It shows signs of use.

Optics: 9/10
The optics look good.

Mechanics: Needs Repairs
The diaphragm is stuck closed down. Aperture and focus rings move smoothly.