I know you guys like photos, and there's probably someone that doubts what I have is really a guild...
I bought this around 1980. The guy I bought it from didn't know much about it except that it didn't have a serial number, so must be a prototype or something like that. It was my absolute favorite guitar of all time until I got my Nightbird. Now I love them equally.
Notice the master volume control. I've never seen one on this body style. The extra mini-toggle is a coil splitter that I added shortly after I got the guitar. Is the TRC on right?
Yes, it really does have a bolt on neck. And I'm sure the body is mahogany not ash. I like the tone; the maple neck is snappy while the mahogany body has a round woody sound.
The finger board is ebony, but not bare; there is finish on it. It has proven to be VERY durable. Seriously, the frets have wear, I would expect a bare wood fingerboard to show wear, but this stuff is just a little dull in the usual spots. The guitar body shows signs of checking as you'd expect from nitrocellulose lacquer, but whatever is on the neck seems to be tougher.
Wha? No serial number?
If there was ever a label it was gone before I got the guitar.
Notice the coil tap...
And, just as a bonus, the 1937 Gibson L7 that I bought rescued from a kid that decided it need a polyurethane finish. I bought it right around the same time as the S-300, but unlike the Guild it sat in the case until a few months ago when I had Bernie Lehmann refinish it. It's sitting next to a 1938 Gibson L7 in Bernie's showroom. Which has the original finish?