Cosinon fast prime 55mm lens. f1.4. M42 screw fit.

Excellent Cosinon (possibly made by Komine?). 55mm focal length, f1.4 aperture. I've tried to capture the quality and condition of the glass. The only issue that I can see is the rubber focusing ring is a little loose (just the outer rubber bit, I guess the glue has perished over the years).