I came upon an interesting Christmas stamp recently in a large lot of assorted Christmas seals.

The first two stamps were the 1934 Xmas seals issued by the Canadian Lung Association, easily recognized by the perforations, in both English and French versions.
The third stamp, English version imperforate, was issued by the Muskoka Free Hospital for Consumptives. It is listed as such in Green's Catalog of Canadian Local and Provincial Tuberculosis Seals (2008 ed.)
But the fourth stamp, the French version imperforate, I have not seen listed before. It may be a imperforate version of the Lung Association seal, or maybe it was an unlisted French version used by the Muskoka Free Hospital? Can anyone please provide some insight?