I picked up a Colt SAA 1st Gen I think. It has non matching numbers,623xx and 1105xx To get a letter from Colt do you give them both serial numbers and do they charge you twice? I don't know much about them but it is a 38/40 with 4 3/4 in. barrel. Not marked US Army, with a 2 line address,also it came with solid bronze grips with the Colt Mustang and the Mexican looking Eagle. Any help out there? Or steer me in the right direction. Thanks Butch H