They were just like a GE in one respect..
The first one like I have was much overbuilt, then they cheapened it every year and lowered the price, if you think about it, the first GE canister had a 10 foot hose and lots of attachments when it came out in 1952, "Model 815" by 1955 it had a flip over rug/floor tool,and only a dust brush,crevice tool and upholstery tool,where the grey 815 had a nice cardboard caddy and several extras like a demother,special drapery tool, seperate rug and floor tools, in 1952 it also was 99.95, I know about this one because my Mother bought one new, my Aunt bought a pink GE model c-3 in 1956 and it was 69.95, same basic machine, just cheaper, they did add a dolly, but took off the nice step pedal swith and just had a normal toggle switch, the Jet 99 was much the same, it got cheaper every year.