That is indeed a Surgilator, with a Kenmore cap on it. Odd that I just saw this combination the other day in a Kenmore washer I received. In mine, both parts were clearly brought in from another machine.
The basket with the uninterupted row of bottom perforations versus the patches of solid then patches of perfs is an evolutionary change that Whirlpool made in the U.S. in the second half of 1981. I don't know when this was done on Canadian models, or if it even was, but it sounds like it may have occurred around the same time. In the U.S. this coincided with a significant change in the baseplate and outer tubs.
Gordon