I've got a 1954 Canadian $20.
I can't see the picture well enough to know if it's a devils head for sure, but I suspect that it is a Modified note.
It's in VF condition, bordering on EF, as there are no sharp creases anywhere, but about 4 counting folds. (I think that's what these are?) There is no soiling or discolouration that I can detect, an dthe edges are in remarkable good condition with no tears at all.
Serial number is G/E 5138615, and the signatures are Beattie/Coyne. This is not a replacement bill.
How much might this bill be worth, and how do I find a collector in Winnipeg?
Cheers,
Rob