"...combination of parts is..." Far more likely to be typical. Weapons techs have never cared who made what part. Parts came out of a bin and got installed. In any case, bolts are not drop in parts. They must be fitted for headspace. Mind you, it's entirely possible your 2 have been fitted, but not likely. Easy way to find out is with headspace gauges. Those you can buy or rent. Reamer Rentals rents 'em for very little money.
S/N 354744 is from 1920, according to the Old Guns S/N look up. It's possible the barrel wasn't installed until 1922 but it's more likely from a rebuild. Preferably an arsenal rebuild.
The right hand bolt in the CMP Booklet picture appears to be an '03A4 bolt.