That is a really neat pistol
Just for a point of reference mine has the newer style frame with the rounded edges and the newer yolk retention screw with the spring plunger the same as my model 25-9 the serial prefix on my 25-9 is BEV, of course I have nicknamed her Beverly if I can figure out how to post photos on the Forum these days I may take a picture of the pair and share either way whatever you paid it is worth it these are scarce as hen's teeth and highly collectible and great investment guns for in the future who knows what they will be worth.
I had a couple of questions on what I said about frame differences. I was making a comparison between frames on the over run guns. To make things clearer (hopefully) here are some pictures.