Thank you (and all the other posters) for your response. In the interim, I was able to determine the guitar was acquired in the early 70's which would lend some credence to it being an original from the 60's.
Assuming it is, I was able to find an original marketing brochure from Epiphone with the dimensions, and you're correct that the Access Stage 3 Jumbo, appears to fit. My intention is to have a family member bring it from Ohio to Arizona when they fly here for a visit in the spring. While I hate the thought of it being shipped, I can't come up with a better option. Thanks again for your help.