Gallon Breweriana is one of the under-rated aspects of general Breweriana collecting. The gallon cans (128oz) cans were produced in a relatively short window. This being basically the 1960's to the very early 1970's.
Thus, as you might expect, the brewerania produced for gallon cans during this short window was also few and far between. The little that exists consists of the boxes that the can came in, some signs, taps and some misc items.