Pentax Fish-eye-Takumar 17mm F4 M42 Mount with Original Leather Case

I believe this to be in very good condition. It has been securely packed away in its protective case and in a cool environment since I inherited it. The metal casing shows some minor ware from its age. Please look at all pictures for a more accurate description. Feel free to ask any questions you might have and thank you for your interest in my lens