Stroh's Bohemian Style Beer Washroom Sign

I'm not generally a sign guy, but I found this vintage "Stroh's Bohemian Style Beer" sign to be quite amusing as it points the way to the washrooms with the little dig at the bottom in quotes saying "So Now You Know". It's a double sided tin sign that could be hung where it could direct patrons to the washroom facilities. Year unknown, I have not been able to find another like it.