williamson prototype…

On the heels of an email from the wineleopard inwhich he sent a picture of a prototype corkscrew that may have been sent to the patent office in the 1880’s, I dug through the drawers of corkscrews I have, and pulled out a Williamson corkscrew, that looks like it too could be a prototype.  Unlike any other metal handled williamson I have ever seen, this a rather cool looking piece, that I would love to get more information on.  At the CCCC AGM, Fred O’Leary was leaning towards "yes, prototype."  Has anyone ever seen another one?
 
Another mystery to be solved…