Interesting debate. This is a 1947 factory nickel 4" M&P with the correct stocks. IMO, Post numbers 16, 17,& 19 puts the OPs gun/stock question correctly in perspective
This wouldn't have been a "debate" at all if we hadn't all been so eager to answer a question the OP never asked, namely about the gun.
In English, frequently less is more, but not in this case.
"Would these grips be the correst ones to put on a late S-prefix M&P?" might have been dealt with in one or two answer posts. But then, we all have too much time on our hands, or we wouldn't be here.
Yes, I knew the gun was a M64. It was the stocks I was asking about as I need a set for a late "S" series M&P. I was single minded and did not consider the entire pic. Being obtuse comes easy for me in that aspect and thanks to each and all of you for helping me.
Whew glad we got that sorted out. It is interesting how some see one thing some see other things. Then there are those that see everything. Nice model 64 and the grips ain't too shabby either.