Sorry to bump an old thread, but I think I might have something a little unique..
My recent Pentax K purchase came with a zebra Auto-Takumar 55mm f2 lens. But according to
documentation, only the f1.8 came out with the zebra finish while the f2 and f2.2 were completely black.
Frank's documentation does mention a zebra f1.9 55mm which apparently was solely made for the Tower 29 sold by Sears, Roebuck & Co in the USA as a re-badged Pentax K.
Does anyone else know of any other zebra Auto-Tak 55/2, or do I have a bit of a rare horse?
Edit: I uploaded more photos of the lens to imgur. You can view them online
here.