Well, out of sheer cantankerousness, you can call it what you want...you would be wrong.
One thing is for sure..the OP's M&P is a nice example I would like to shoot.
Here is my Pre-Model 10...It dates to 1957, but missed getting stamped Model 10.
I got it off Armslist last year for $225.
Saw it online, and noticed it was located 10min from my house. I was home with it 45 min after first spotting it.