The PZL.37 Łoś (English: Moose) was a Polish twin-engine medium bomber, used in the defense of Poland against the German Invasion in 1939. The main production variant, the PZL.37B (or: Łoś II), was fitted with the twin tail and newer Pegasus XX engines. Production of PZL.37B for the Polish Air Force started in autumn 1938. [wiki]
