I will tonight try to post some photos of the lens. I received it yesterday in the mail. It is a CZJ 5cm 3.5 Tessar T (rigid), mounted in a Contax lens barrel.
The old Contax lenses for the Contax I had a 2.8 Tessar collapsible, followed by a collectible (sharp) 5cm 3.5 collapsible Tessar, which differs from the lens that I now have.
The lens has a blue coating, so it is coated. I will find a suitable lens hood for it and will use this lens next weekend. Brian shimmed the lens for Contax cameras. He has one like it in Nikon S mount, and shimmed accordingly.
I will keep you posted.
Here is what Brian has posted on his lens: http://www.mu-43.com/gallery/g1591-c...r-s-mount.html