National match m1 garand

I came across a 1971 DCM sales NM M1 garand type ll with paper work. It had all the proper markings of a 1963 as well as the form and fit of a well built NM except it was missing the NM on the gas cylinder and the last four s/n to receiver written in white on the floor plate of the trigger assembly.
Using reference material JC Harrison, GCA and American rifleman related articles. My question: The buyer did not make any changes or modifications of the NM M1 garand, the paper work calls it a NM M1 garand, but with mixed matched parts would it still be a NM if not to NM standards?

Very unlikely that it left SA like that, variations from the SIP are extremely rare. The serial could have been cleaned off, that's not unusual, but it raises flags in combo with the cylinder. However, with proper documentation and ALL the other correct characteristics, yes, it's still an NM.