[Arran]

 Are you referring to Philco radios in particular or U.S and Canadian made sets in general? Well aside from the fact that there were manufacturers that were entirely Canadian, who produced sets for the Canadian market, Like Rogers, Marconi, or Grimes-Phonola/Electrohome, the Canadian subsidiaries of companies like Philco, RCA, or G.E made models that were unique to the Canadian market and not simply clones of U.S models. There were some that were exactly like their U.S counterparts, some that were almost exactly like their U.S counterparts but with some minor differences in the cabinet or changes in the tube lineup like substituting a 5Y4 for an #80, and in the case of Philco sets that used the same chassis but had a different model number, or some like my Philco 3118 that used an identical chassis to a U.S 118 but used a different cabinet.
 One common feature to many Canadian built sets, regardless of brand, was the use of 25 cycle power transformers, as there were quite a few areas that had 115 volt 25 cycle power grids, even into the late 1950s. This makes absolutely no difference  in terms of operation today, a 25 cycle equipped set will work perfectly fine on 120 volts 60 cycles per second, in fact the transformer should run cooler as there is more iron. Where you may run into trouble is if you find something that has a 25 cycle motor in it like a clock or a phonograph, most were converted before the switchovers in the late 1950s but the odd one slipped by.
Regards
Arran