Petro Canada was started by the Liberal and NDP governments back in 70's. You don't want me to go there!!
I have seen pictures of the station that was in Saskatoon ( had one in Regina also) back then and actually acquired one of the big station signs that they had used. So your gas pump panel is all original, value wise could be anything, depending who wants it I guess. For sure would be better if you had the original pump all complete.
Wanted early tin litho signage.
petro, farm, auto, etc.