1930's Gibson L-OO?

I'm attempting to identify this guitar.
I believe it's a Gibson L-00. There are no serial numbers.
The people I got it from had some work done on it from a Gibson dealer.
This was about 15 years ago. Another rather annoying thing is that they changed the logo. In the right light you can still see parts of the old logo.
The story is that someones grandpa bought it used in 1936. Through out the years I guess it needed some repair so they took it to a dealer whom replaced the logo(no idea why) and did some body work. If anyone can identify this please let me know.