Lockheed 12, L2-38, photographed in 1985 at the Militaire Luchtvaart Museum at Soesterberg.
"In 1938 Lockheed began with the development of a military version of the Lockheed 12, the Lockheed Model 212.
The NEIAF was the first customer and ordered September 27, 1938 12 Lockheed 212-26 trainers.
The first NEI Lockheed 212 made, c/n 212-01 L201, had her first flight March 7 1939.
The first five machines arrived at Surabaya June 1939, where they were assembled.
In October 1939 another four were ordered, which were delivered in April 1940. These were designated Lockheed 212A-13.
Mid August 1940, the registration system of the ML-KNIL was changed. It now consisted of one or two letters indicating the manufacturer, than one digit, representing the class of the aircraft, e.g. 2 was a transitional aircraft, followed by two or more numbers indicating the sequence number.
The first three Lockheed L-12s were completed in October 1941, three in December 1941 and four in January 1942. Meanwhile, the war in Dutch East Indies was in full swing.
The first Lockheed 12 was sent to England, for Prince Bernhard, where it arrived in August 1942.
The plane received RAF serial number NF753 and PB-2" .