With the Astabula-style cranks and forks and the two-speed coaster brake hub and the graphics make them look like something from the mid-1960 through sometime in the early 1970s. I worked as a bicycle mechanic from 1972 though 1977 and never saw anything like them. Difficult to believe they would be younger than about 1975, and they do not have the 1950s look at all.
Is the 2-speed hub a Bendix or a Sachs?