The rare Soligor 1:2 135mm C/D (M42) - lots of pics

In my search for a A*135/1.8, I stumbled over an almost even rare Soligor 1:2 135mm (C/D) M42 lens

It arrived this morning!

First some shots off the lens itself, then some quick impressions.

My first impression is that it's sharper than I expected. Rendering and contrast is a bit flat (probably because of the lack of coating). All shots wide open without postprocessing.

Is it sharp enough?

Even through double glazing

Interesting bokeh (no noise reduction)

Some 'vintage' rendering and contrast (100% sensor crop)