A postcard/painting probably depecting a formation of Yokosuka B3Y1s.
Another postcard/painting of a formation of Aichi D1A1s. The airplane in the foreground is "Hokoku - 85". For a photo of this particular airplane, check MODEL ART #327, p.182.
A VERY interesting postcard/painting but unfortunately of rather poor printing quality (notice how the colours are "shaken") showing a formation of Mitsubishi Ki-15-Is. Notice the colors on the wing of the airplane at the left corner. Don't they stronly resemble more Italian than Japanese colours?
