It should read "Ridgefield NJ" on the barrel. That means that it was imported and sold by Navy Arms Company.
BRECIA ITALY is stamped on the barrel.
It should read "Brescia Italy". Back in the day there were several small manufacturers in Northern Italy in the Brescia area. My guess is that it was manufactured by Euroarms and imported by Navy Arms, but photos will better sort this out.
PN XX8 PN XXV so 1969 & 1972 what does the PN stand for?
You are correct on the date codes (in reverse order) but the PN is part of an Italian proof mark as is the other proof mark, both located to the left of the date code.
If you are concerned about a damaged frame, we need to see photos of the revolver disassembled, especially ones showing the inside of the recoil shield area to see if heavy loads have imprinted the ratchet at the rear of the cylinder upon the recoil shield area. That will cause a lot of cylinder slop which some erroneously allude to a stretched frame, which it is not. That can be repaired, but it is not just kitchen table gunsmithing.
There are no parts available for those revolvers. If internal parts are needed, the best you will be able to do is either modern CNC machined Uberti or Pietta parts (hand, bolt, trigger/bolt spring, et al) and fitting
will be required.
If they were available to me in somewhat decent shape, I would pay no more than $125 each, do parts swaps to attain at least one good revolver, and relegate the rest for private parts stock or sell on EBay.
Good luck with your endevors!
Regards,
Jim