Poland and Romania used the PZL P.37 Los.
In 1938 the PZL P.37 was shown at the Belgrade Air Show and the Paris Salon.
The P.37C and P.37D were ordered by:
- Bulgaria: 15
- Romania: 30
- Turkey: 10
- Yugoslavia: 20
These were to be delivered in June 1940 but World War II started well before then.
Defense of Poland
There were approximately 36 / 45 operational P.37s when Germany invaded. Over the next two weeks 26 were destroyed.
The survivors were evacuated to Romania and were used by the Romanian Air Force on the Eastern Front.
After World War II
Several P.37s survived the war with the Romanians and were used as target tugs into the late 1950s.