This is the m39 version of the lens, a silver one made in 1957.
This tiny little thing is producing probably the best bokeh of all the lenses I have. And at f/2 is really quite sharp as well.
A log on a path in the "Fossiata" forest, Italy
I've probably definitely read too much fantasy stuff when I was a kid, but this kinda looks like some kind of dragon to me!