If that is an early 1980's scope, would have been from time when variable power was still thought of as kind of "iffy" by many hunters. Certainly in Central and Western Saskatchewan, maybe elsewhere, a lot of hunting was done with iron sights, circa 1950's and 1960's. Was during that time, I think, that sealing and gas purging was started - prior to that, using a scope meant dealing with condensation and fogging - inside the scope, not just on outside of lenses.
So, a young man who got his new made-in-1955 Winchester 70 in 30-06, likely did fine until late 1970's or so - his eyes would have changed - now needed / wanted a scope to shoot, and could likely afford one. So, brands and models like Leupold M8's, Redfields, and some better models of Tasco, like the "World Class", were often desirable. Bushnell - especially Bushnell Banner - seemed to appear a lot in the bush. You might want to recall that at that time, often, something marked "Made in Japan" was commonly viewed like "Made in China" or "Made in Korea", today.
I am not sure, today, there would be a lot of difference among those, from that time, and maybe others. I do have a made-in-Wetzlar Hensoldt from about that era - made in Germany - that glass and view is to take your breathe away after looking through made-in-USA scopes from that time - new Leupold FX and Freedom are getting close, in the past few years. I have no clue what various brands would have sold for, then - and I suspect that was important as well. I have come to believe that bias springs, erectors and gimbals are actually quite important in scopes, but not much about that stuff was mentioned in the marketing from those days.
At least where I grew up, most hunters had years of success with iron sights, when they were younger, so lower powered fixed scopes - 2.5x through 4x - seemed popular purchases - might have been easier to adapt to - might have been price? Was "common knowledge" among those guys that a variable power scope had way more moving parts, and was not going to last as long, or be dependable as, a fixed power scope. Today's "common knowledge" is likely different than that - at least as reflected by sales - is actually hard to find a quality new fixed power scope these days - by anyone. I still continue with that thought - my 9.3x62 has a Leupold M8-3x on it, is deliberately not a variable power.
And, on reflection, even though we used to live across the street from Mr. Gaillard in St. Brieux, Sask, (he was "old" in 1965, so likely the father or maybe the grandfather of the barrel maker guy), I did not know anyone who had a rifle for dedicated purpose of target shooting - was all for hunting or pest control - even the local "turkey shoots" were most commonly with Cooey's and similar.