The is a Zeiss 5.8cm F2 Biotar for Exakta. There are many micro scratches on the front element, enough probably to affect results, but I think it might still be capable of doing some interesting work for the determined vintage photographer! The focus and iris actions are smooth and the iris blades are free of oil. Priced accordingly and sold AS-IS (no returns). Price: $25 plus shipping. Payment with check or money order preferred, but I accept PayPal.