Old Dutch Cleanser Store Hours Cardboard Sign

Old Dutch Cleanser Store Hours Cardboard Sign  This is an extremely rare survivor.  Hard to pinpoint, either 1940s or 1950s.  Does not look to have been used, has a couple creases pictured.  But both hour dials turn nicely, and in overall wonderful condition.  Measures 8 3/4" X 7 1/4".