It's a modern reproduction. It has been said that the plates were found in a dump about 1960, and that they found their way into the hands of a Toronto dealer who had some copies printed. The $4 illustrated in Canadian Bank Notes is similar. The portraits aren't very well printed; the tops of the heads of both Merritt and Benson seem to be missing. The very dark areas in the border, at the bottom centre and left side particularly, are also characteristic of the reproductions.
Sorry to disappoint - but the "note" would still have some very modest market value.