Painting: "The scene in the pub"

[Бург]

Something in this funny picture is from the Flemish, Dutch genre painting. Joke
At first glance, suggested that the boundary of 19-20 centuries. Upload photo fragments. Now I'm in doubt. Probably the 30-ies, but just not copy. The level of painting, of course, not very ..., but carefully. Who has any opinions?
Size - 49h39 see on a stamp - Hans Schmidt, the city of Augsburg, and even the phone number on.