Jake: Yer geetar is quite a nice and rare piece! These are quite playable and the "De Armond by Rowe" pickup is a hottie!
(Please clip those strings...

)
One (a '57, recently restored by me for Forumite Len Hruszowy) sold for about $2500.00 on Ebay last week, I believe. Unrestored, and being a '56, it's still worth some substantial cash. Judging from your photos, it's largely unmolested. You don't mention that it has any issues, either. Don't modify it! Clean it, restring it, and enjoy it. Hopefully, you've still got the original case, too.
Here are two shots of that restored Combo 400:
I would not have restored it for Len, except that it had been thoroughly thrashed by previous owners, and he wanted to make it presentable. The original guard was bent, beat, worn and beyond any charming "patina". Hardware was a mess; wiring was wrong and trashed, and the body had been painted with some sort of varnish/stain with a mop, I think. The frets were shot and the fretboard had soaked up so much dirt and filth over the decades that the old frets were falling out--the wood was balsa-soft on the surface.
It took the usual: time and effort, but the results were well worth the trouble.
Yours is much nicer than this one was: a beauty in original condition.