Chicago Firemen played a 3 game series vs. the NY Firemen in 1922
https://mobile.nytimes.com/1922/07/2...6-victory.html
Not sure if this flask has anything to do with it, the last game was played at Ebbets Field. BMC of C throws it off, but maybe something like Brooklyn Manahatten Chamber of Commerce? Couldn't find info on the first 2 games, only the last one in the link provided.