Help Identifying Archtop?

Hi all. I found this for sale at a good price if it's legit. It looks like it could be a 1947 L7 but that's a guess. It's a bit of a fixer upper, obviously. I don't have the serial, unfortunately, but please let me know if there are some things I should be looking for when I check it out in person. Any help from those familiar with Gibson archtops is greatly appreciated. Thank you.