Wow! This is my first time ever seeing a Penncrest DAM or Connie! Very cool! I always did like their Convertibles.
By the time I worked there in the early 80s, at least the canister cleaners were sourced by Eureka, and things were already being called "JCPenney" instead of "Penncrest". I don't recall if there were any Hoovers in the mix at that time or not.
They had some great private-label products at that time and over the years prior. I still have a food processor I bought when I worked there. I had some great electronics from there too, including my first boombox and first "walkman".
Around 1982 or 1983 a lot of the hard lines started disappearing at Penney's and today of course it largely a softlines store. It was much more like a Sears or Wards when I worked there.
I always thought the Sears vacuums were cool, and I liked the Wards as well, particularly when they had the seal who balancing a beach ball on his nose via a vacuum blower. I miss stuff like that, washers full of poker chips, working dishwasher displays with see through fronts and things of that ilk.