Industar-61 lens with E-mount adapter

This is an Industar-61 old lens. The body is Leica screw mount. Focal length is 52mm, aperture is 2.8.
Includes the body, front lens cap, E-mount adapter, compatible E-mount rear cap, and a hex wrench for index adjustment. The body shows signs of use as it is a very old lens.
The focus ring and aperture ring move without problems, but there are some areas with unevenness or grease loss on the focus ring side, so there are slight differences in tension.

The lens has some cleaning marks on the front. The inside is relatively clean, but there is some dirt? mold? on the edge of the lens. I don't think it will affect the image quality. You can still take pictures with it as is, but if you are concerned, it is better to disassemble, clean, and service it before using it.
The aperture blades are of the 10-blade type.
The included mount adapter is in good condition, having been used a few times. The image quality is quite good. There are no infinity focus issues. The adapter can be attached firmly without any play.
There is no warranty as it is an old lens.
It has been test-shot and its operation has been confirmed with the mount adapter, but it is treated as junk due to its age.

Focal length...19-70mm

Maximum aperture...2.1-2.8

Other features...Old lens