Asahi Super-Takumar 50mm f1.4 M42 Thorium coated 6 aperture blades
Pentax

includes
Front & rear Lens caps

The yellow tint front is Thorium coat
that is what provided the super sharp to this famous lens
You probably already to leave it under the sun to clear the tint if you prefer

Smooth Focus
Aperture clicks as it should
Dry blades no oil spill

Please expand the pics to evaluate the outer condition and appearance

M42
50/1.4
50/1,4
50 f/1.4
50 f/1,4

1:1.4/50