hi.. john..
thx so much for taking the time to respond.. your answer has been very helpful... i too have been investigating some more.. and did find out the #15 is just a number for the stock and barrel.
contacted the firearms museaum in virginia... and they have 2 in their collection.. but did state they are real hard to come by.
i will figure out how to list photos on the site and wil do that .
again many thx
george