yessir, there are some out there the factory did, just like that, and YES, get it looked at and appraised, that gun is worth LOTS ,last one we saw, used, and not that nice of shape went for $2500.....past weekend, plain ones were in the $1400 -1600 and selling............
gotta find out just how it was made, as thee were also "sets" and the the model 12 was called a 'black diamond'............usually the rule of thumb is it was "customised" for the owner, BUT, by "whom"....if factory,BIG bucks.....
do your homework,and do not just believe one or two guys, very few folks that I "trust" that know this info......................I take them to the OGCA and get about 10 opinions before I can make a proper evaluation.....
I see you are in Ohio,, if you are anywhere ear Wilmington, bring it over to the next OGCA in 2 weeks, and you'll find out quickly.........get a hold of me and I'll get you a "guest pass".........