Why does it need to be labled?
By the account of Tim McMurray and the original owner of this particular gun, I would leave it as it really is, a "Prototype" as it never really made production. This particular gun was bought from a Sheridan factory employee, (They had one near St. Louis) and then sold to the current owner. Th original owner stated it to be a "Prototype". When we get verification of more than this one, then maybe we can label it? Yea, I know Tim said there were 200, but we havent seen any pics or proof of any others.
And this particular one shots at full velocity..........