I'm totally ignorant, my first impression was that the general arrangement is characteristic for the mids-20s, but the lady's attire hints at the late-30s, and at this point I gave it up. Still I was convinced it was one of the hundreds of aircrafts made in or inspired by small US firms like Aeronca. Anyway,
"Early aircraft were powered by a 29 kW (36 hp) Aeronca E-113 air-cooled, boxer two-cylinder engine mounted in the extreme nose with its cylinders exposed. Early production aircraft replaced the US-built Aeronca with a very similar Czechoslovakian engine, also built by Praga, called the Praga B. Later the similar but more powerful Praga B2 was fitted and from 1936 this was replaced in turn by the four-cylinder Praga D producing 49/55 kW (65/74 hp), with each pair of exposed cylinders merged into a single housing for lower drag. Aircraft with this engine were referred to as E.114D"
BTW that's a twin-tail Beaufighter or Buckmaster.