The three top bracing patterns I have observed on Guild dreadnaughts that I have owned
(models listed between asterisks were reported by members of Lets Talk Guild)...

Note the primary differences shown are in the upper bout and sound hole bracing. The change
from the "popsicle" brace to neck block extension plus wing braces occurred in mid-1974.

Sound hole reinforcement plates have been noted in dreads from 1984-1994, with separate
braces before and after.

Note the size of the bridge plate and positioning of the tone bars and lateral braces varies
somewhat within each of these different patterns... whether this is model specific or individual
variation is hard to say from the limited number of samples.