S&W Victory Revolver Marking Questions (Canadian Lend Lease)

My Canadian-issue S&W has a marking I can't find in Skennerton.

I recognize the "proofed in Birmingham in 1954" crossed swords stamp, and also the Canadian military ownership mark shown in the detail photo, but does anybody know what the capital "P." stamp (near the Canadian mark) is for?

Also, out of curiosity, what are the inspector ranks that are applied to the Brimingham proof date stamp? Online I've seen that there are eight ranks, with #1 signifying "chief inspector," but I've no idea what the titles are for 2-8.

Nice, nicely marked...

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Originally Posted by Troglodyte

Online I've seen that there are eight ranks, with #1 signifying "chief inspector," but I've no idea what the titles are for 2-8.

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I'd have to look around, but I believe I read that the lower the number the higher the rank.
Will add if I can find,

ETA: It may have been: U.S. Handguns of World War II, The Secondary Pistols and Revolvers by Charles W. Pate
But I'm not sure.

This may help (?) a little:
British Commonwealth SW Revolver markings | Smith And Wesson Forums

Here's some Proof marks by different countries by Ian (My Nephew works for him).
Won't answer your questions, but is interesting:

Proof Marks - Forgotten Weapons

Attachment 125351Attachment 125352

Here one I had late last year

That's a nicer property stamp than mine.

Mine also has a 38/300 stamping next to the barrel on the left side. Redundant given the manufacturer's barrel engraving.

Great looking pistol.