Rodenstock Rogonar-S 50mm f2.8 enlarging lens (sn 10494785). Very good condition. Glass is clean and clear. Aperture blades are clean with no oil staining. Aperture change is smooth. Aperture on-off click stop button works. With case (case is a Kowa case).  Fixed price postage to Australia only. Questions welcome. Offers will be considered.  Additional photos can be provided on request.