That's what the writing on the back of the box suggests, yes.
But in absence of tracklistings, the DEPanorama website isn't really helpful either (they don't seem to have any numbering that fits with the one on the website for the 10CD set).
Same with Bruyninckx... too bad, but I guess then this 10CD set might be a good buy for someone who hasn't started buying the Storyville 2CD sets (of which I own six so far, eight more to go...)
Bruyninckx has an album listing at the end of his Ellington entry, including the following:
What are these? LPs that preceeded the Storyville 2CD sets?
Or are these the original non-commercial transcription discs?