Was this from the States? Because something related to Prohibition upon alcohol would be my guess. 1920-1933 in the States.

Could also be something about womens’ rights?

EDIT: “!” to “?.” Not sure why I did that.

@JohnnyEnzyme
Looks like a c1920 (Missouri or New York?) license plate (which matches the ladies' fashion).
#cars #1920s #fashion #flappers