Beehive blenders
The vintage Oster "Beehive" blenders, that I have seen, only had a toggle switch or a rotary switch with one or two spends. The power draw of the base units was much less.
The later Pulsematic units had greatly increased input wattage. I have seen them over a 1000 watts, and of course as the buttons imply, multiple speeds and pulsing ability (called "controlled cycle blending" by Oster).
I have never had a Beehive, but the pictures I have seen indicate the blade mechanism was similar if not identical to the later pushbutton units.
I think advertising set the Oster's apart from the others, along with the memorable name, "Osterizer."
Having grown up with an Oster, I was not impressed. Ours was over 800 watts so it rarely stalled, but it was a nuisance to get it to process viscous foods, they just didn't want to circulate in the blender jar. Air pockets formed and you had to continually stop and use a spoon or spatula to get the food back down to the blades. My mom gave up and didn't use it at all. It sat on the shelf in the kitchen literally for years without getting touched. Even I, the appliance nut, didn't use it.
Later I got a General Electric, which was light years ahead of the Oster. It didn't require near the assistance for it to process thick, viscous foods. The GE also had lower speeds on the bottom end which I found much quieter and useful for whipping cream, etc.
Osters had a nice look, were hefty and had lots of power, and the base unscrewed from the jar which aided in cleaning. But.....they were horribly noisy and you had to stand right there incessantly scraping down the sides and breaking up air pockets with anything but the thinnest of liquids.
Even when I see a mint Oster at the thrift store, I pass it by. I see a lot of near mint ones indicating that many, like me, found their best use was to just sit on the shelf and look pretty. I sold my parent's Oster at a garage sale, I had zero emotional attachment to it, ha which is almost unheard of for me and an appliance.
There are a lot of Oster fans out there who are going to argue with me, and that's OK. I am glad they like theirs. The Oster's might be alright for them, but were/are not for me.