I don't know about the upper-class models, but (from my data sample of n == 2), my '76 Guild F112 has an E - to - E spacing of 1.62" at the nut, 2.41" at the bridge and a nut width of 1.79" My '80 F212c has an E-to-E spacing of 1.62" at the nut (same), 2.43" at the bridge, and a nut width of 1.82". These two instruments feel VERY different...
...my (n = 2) cents.
-Dan
Dan, thanks again for posting this. I'm checking out F112's, and other guilds right now, and the nut string spacing is a factor I'm looking at. Not easy to find this info otherwise!
Best
Neil