You are looking at a Contax Biogon 2,8/21 T* lens, with GF-21mm Viewfinder.  Superb quality wide angle lens for Contax G1 and G2 cameras.

It is immaculate to look at and in very good working condition to the best of my knowledge.

 There are no scratches or dents and everything rotates very smoothly.  The optics may be slightly foggy, or they may not be, but I am not a camera expert so can't tell.

Comes in a Contax box.

Can show more shots if required.

From a pet and smoke free household.

See my other similar items.

Thank you for looking.

On 29-Apr-17 at 12:02:39 BST, seller added the following information:

SHOTS OF OPTICS ADDED.