220657 - Not in the book
222845 - 12 ga
227020 - 12 ga

The case color is not as brite the bores have not been honed reason I say this is I know the history of the gun . No dents in bbl’s no burred screws original butt plate original pistol grip cap . A bit of history on me I have been in the firearms business since 1977 retail and gunsmithing rifle building , hot caustic bluing I’m only saying this to state that I’ not a novice when it comes to noticing alterations on firearms.
Not that I know it all I certainly may miss something as far as work done to a firearm

There were 145 Grade 2 hammerless 20-gauge guns made with 26-inch Damascus barrels.

Welcome Don, that sounds like a nice one. We feel your pain with the lack of available 2-1/2" low pressure shells up north. A lot of us shoot RST shells in our vintage guns and RST won't ship to Canada. Hopefully handloading is an option for you.

Another option would be to join the PGCA so you can sell or trade your gun here for another Parker with 2-3/4" chamber fluid steel barrels and then you can shoot commercially available target and light game loads in that gun.

I should clarify brite . No frosting no discolouration the bores have a shine to them but certainly not like new chrome type shine

Yes we don’t have as many options up in the great white north also shotguns are not looked upon with the same admiration in this country as they are in the us . That being said there is a small shotgun community and all water seems to find its own level

Thanks for the info likely the only one in Canada

Probably the nicest 2 1/2 inch 20-gauge shells I've ever used were the British Lyalvales. Perhaps being part of "the Empire" you can get them in Canada.

"may" being the catch word. A well loved gun gets wiped down whenever it's used, accelerating the loss of case colors, but a well loved gun that also gets it's bore mopped whenever it's used usually has a nice shiny bore.

Yes I would have to agree with you on all accounts . That’s how I look after my guns . I have s 1948 model 12 trap that I shot gor 25 yrs likely 300,000 rounds not much bluing on the reciver but the rest of the gun looks very nice