Hello Russ,

Now you made me curious!
Serial with DE points to D-55! which is an acoustic dreadnought production started 1974!
I need a picture in this case

It's clear from your description it's not a D-55, but it is also clear that the serial number does not exist in the original guild records.
Are you sure the prefix is DE ?
I hope you can send a picture?

I do know the writer of The Guild book and he will be very interested as well about your guitar if indeed the prefix = DE!

As it's an archtop there's also a tag in de body. What does that say?

Fred