Lately I have seen a few backsights for the No5 marked "P" on some of the auction sites.

Is the "P" mark for Wah Pakistan? Or is it for Poole, Dorset, UKicon?

I have been under the impression the the "P" mark was for Pakistan Ordnance Factory. If these No5 backsights are from Pakistan that brings up the question why were they making No5 backsights?
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