As far as I'm aware DuMont relabelled tubes from other manufacturers, most probably mainly Sylvania. Their boxes have a simple yet very interesting and unique style.
I actually only came across two different box styles from DuMont. I believe the one in the next photo is older:
These boxes contain Octal TV dampe tubes. Other sides of the same boxes:
The top flaps showing their contents: 6aX4 and 6AU4 tubes:
The bottom flaps:
More interesting are their later boxes in a gold color:
These boxes contain an octal and a 9-pin miniature tube.
As with mot boxes the tube types are indicated on the top flaps. here we have a 6AX4 and a 6AM4:
I hope you enjoyed the presentation of the DuMont Tube Box Art. Say tuned for more articles about tube box design.