These four liners were designed to fit in perfectly for the beer trays of the era and to keep them clean and dry. The tray liners are actually perfectly round, but they look ovalI because of the graphics.
They are double-sided so that bars could just flip them over on a tray when one side got dirty or a little wet. The liners are made of some fiber-like heavier paper that would absorb beer spills or stains.
They are 11 1/4 inches in diameter.
This design was more unique than most of the Iroquois liners in that it has an oval logo.
Iroquois Beer started in the late 1800s in Buffalo, NY. During Prohibition, the brewery produced soda and “near beer.” After Prohibition, Iroquois sold about 40% of the beer in Buffalo and eventually spread to eight states (including Michigan), buying up smaller breweries.
The company couldn’t compete with the big dogs like Pabst and Schlitz, though, and the brewery closed in 1971. I believe this tray is probably from the 1950s, maybe 60’s.
The tray liners are in generally good shape. One of them has some creases at the top and bottom borders, but the other three are in mint shape. All four for 35.