The 2nd 1903 Springfield I bought from CMP was this high number double heattreat with C-stock. It has the B-stamp on the floorplate indicating the floorplate was pinned in-place (since removed).
I was a little perturbed for a couple of reasons. First off, my very first m1903 rifle was a cherry 1909 rifle that looked like it just came off the production line. I paid $35 for it in 1968. So paying
$400 for this one perturbed me when I inspected it.
The green parkerizing really irked me. As did the very poor bedding of the rifle into the stock. Despite everything negative I kept this one and it serves as my only m/1903 Springfield today. I like 1903 Springfields and I especially like them in the C-stock. The original S-stock has a too-short length-of-pull for my arms. Its not comfortable with heavy loads.