It
looks early to mid 1940s to me, but that's purely a guess. I've got one of those Fidelitone dusters, but I've never been able to confirm a date for it. I had my suspictions it was 40s though, due to the early plastic body of the duster & the multiplay needle.
I dont think Permo Inc, Chicago appears on the dusters either, so that gives me a lead to follow up on
