I concur with your assessment. The Jubilees I have (and have seen) are nothing like those.
I bought a pair of the Rivendell Hurets about four years ago, but I didn't remember them being called Jubilees!! I have them on a Motobecane (not a Grand Jubilee :)), and while they look and work just fine, Jubilees they are not!!
I'll have to see if I still have the receipt to see what they called them!!