I good bet that the Cody museum will have the info you need, on a gun of this expense, I wouldn't chance it to something that can be phonied by a good smith that knows what to do. I believe that a letter would be money well spent, and besides if it turns out phony, you can prove it and perhaps buy the gun for much less to have a "shooter" if that's what you want. I have owned 2 orginal M12 28's in my short life both bought, both traded (for doubles) The only reason I bought them was the price was very fair, and I happened to find them at tax return time!! Good luck, Madis wrote an excellent book, and don't hesitate to use the Cody museum.
