Well, friend, you have come up with one that I have never seen. Could you post photos?
Most Canadian-purchased guns of this type were actually the "pre-Victory" as American collectors call them, but they all were the same mechanically: Smith & Wesson Model 10 with a 5-inch barrel, chambered for the little .38&W round as loaded with a 200-grain slug..... and specially bored and rifled to handle the 200-grain .362" slug. The factory called them the "Model 10/200".
I have on in the original calibre, with C/!\.
But a Parker-Hale conversion to .22 RF is one I have never come across.
I am sure that a lot of guys will be interested in knowing more.
By the way, welcome aboard!