I just received an email from one of our readers which found that lens on ebay. The description of the owner says: “This lens is 55mm f/1.0~f/11 , was manufactory in Japan by Kowa. Lens rework on Panasonic Lumix G1 GF1 GH1 or Olympus E-P1 E-P2.“. The lens fits on a MicroFourThirds camera without any adapter!
Click here to read the full description on ebay.com.
(P.S: The lens is currently in auction)