Estonian Aviation Regiment, 1939-1940. Designed as a conversion trainer for the newly ordered Supermarine Spitfire, the PN-3 was also capable of being used as a light fighter. The sole example was named Isamaa pSstja (Saviour of the Fatherland) and is shown finished in an overall Natural Metal scheme. Standard Estonian national insignia with no outlines are worn in four wing positions. Estonian national colours are painted on the rudder. The serial number is displayed on the fuselage in the standard Black with Blue drop shadow.