Who is this Pin-Up Artist?

I've come across two of these vintage Punchboards which I believe are kind of like the equivalent of old time scratch off lottery tickets, although obviously with a little more production value. They're both in excellent condition and feature gorgeous pin-up art featuring gorgeous girls. We're posting these for sale on Ebay and I want the artist names for the listings to help attract the right attention to them. The one with the blue background has a signature that is clear so I can identify the artist as Gil Elvgren. But this red one, which is my favorite of the two, only has a single initial which looks like an "E" and unfortunately my expertise on vintage pin-up artists isn't as sharp as it should be. I don't know if the E is the first name or the last name but I spent about an hour trying to figure it out and then decided I should

Basically I'm looking for help here. If you recognize the artist and/or the signature, I'd appreciate if you could leave a comment which is helpful not only for myself but for anyone else who might be interested in this art.

Thanks!

-Todd (beanlynch)