Agreed with the re-barrel, post 1954.
You can see that the SN stamps don't match the font of the SN on the action. Also note the not so great stamping job...
The question is whodunnit?
H&H will know if they have done it.
If not, the value will drop some.
However, I'd much rather have a re-barrel by the maker than a thin walled, rivelled and pitted gun...
Best regards,
WC-