This Beech 18 (AT-11) Kansan is painted in Cuban Army- Air Force colours. Two were used by the Used by the Escuela Aviación Militar (Military Aviation School). Seen here at Lone Star Flight Museum, Galveston Texas.
The Model 18 was further modified during 1941 as the advanced trainer model AT-ll "Kansas" (subsequently renamed "Kansan"), which was intended for bombardier and gunnery training, equipped with a small bomb bay, transparent bombardier's nose section.
Canadian Aviation Blog