Victron Radio Tubes
Last seen: no advertising found
Victron appears to be another attempt by Victor in labeling tubes for sale with it's phonograph-radio combo sets.
I have been unable to location any advertising in magazines or newsprint, but several examples have popped up from past internet sales.
Recently an active listing was found, and it's evident that Victron tubes were blue, BKNT engraved base tubes. The blue tube craze was in early 1925, so I suspect these date to a similar period.