Here is a picture of the markings on a slightly later (1904) receiver. While they are VERY hard to make out, if you look closely at the remnants of the markings on the OP's receiver, his numbers certainly look as though they have the same font and size.
What I don't understand, is why they are so defaced. Unless maybe the rifle was 'liberated" from the government and the US stamps were removed to hide it's previous owner.
Here are the roll marks on a 1906 Springfield. Note the font used for the numbers is the same as the 1904 receiver and the letter font is slightly larger than on the receiver made just a couple years earlier..
And, just for comparison, here are the roll marks on a 1918 Springfield.
