I've actually seen a couple of bolts renumbered in the same fashion on Port 98s. They look to have been done in the factory as well, just like yours. Does the bayonet match? Did the sling, survive with it?
To bad for the bruises and scratches though, oh well.
The last ones, in similar condition I saw sell in Kamloops, went for $1500 each. They had matching bayonets though and were without blemishes, maybe even unfired, other than factory testing.
With matching bayonet, fired, bruises and maybe even a few more blemishes, like damaged screws etc, $650-$1000. Hard to tell without a hands on view.
Still a very nice piece though and price will depend on what you can get at the time and how badly the buyer wants it.