So I followed your Federal Theatre Project mention, and searched the related collection at the LoC, and look, they have playbills from shows he was in!

Well searched! That definitely looks like some kind of local repertory—tracking the producer-director, he seems have been a Holyoke mainstay. A date on either of those playbills would not have gone amiss, though.

(In return, I can offer a photo of Corey and Betty Field during the original run of Dream Girl, in what looks like one of the real-world rather than daydream sequences, even.)