I took a picture of my berrel , bolt , and the recever.
On a Garand, the serial number on the receiver is the only unique number to that rifle. On all other parts, the numbers stamped in them are drawing numbers and some indication of the manufacturer. The barrels do have a date stamped in them indicating when they were made.
So, unlike many rifles, the Garand does not have parts stamped with the serial number to make them matching for that rifle.
That said, there is information out there that indicate the manufacturing date range of various parts based on the drawing number and revision number. This is how collectors determine if a rifle is "Correct". But, even this information is not 100% reliable as left over parts from earlier production runs or parts from a new revision production run get installed in a rifle as it is coming off the assembly line.
One of the beauties of the Garand is most of the parts, except the bolt and barrel, do not have to be hand fitted to the rifle. And for the most part, the bolt is checked with a headspace gauge and if it does not gauge correctly, another bolt is tried.
There are many photos out there that show field armorers working on Garands. They have buckets full of parts and stacks of receiver/barrel combinations. Except for checking the parts for wear against a gauge or standard, parts are grabbed from the pile and placed in the rifle under rebuild.
Stateside arsenals rebuilding Garands did the same although they probably used more new parts and replaced more barrels than the in theater armorers did.
Very few Garands managed to get through life without at least one rebuild. One of the favorite pastimes of some Garand collectors is finding parts to make one of their Garands "Correct". It is getting more and more difficult to accomplish these days.
Hence the affectionate name "Mixmaster" for most Garands.
This is kind of the "Cliff Notes" version of the life and times of a Garand.