Just before the USA became involved in the Second World War, Stinson built the Voyager model, a two-seat high-wing monoplane. In 1941 the USAAF tested the Voyager, they named it Sentinel, because they urgently needed a liaison- and reconnaissance plane. The first order comprised 275 examples. The aircraft was later adapted and optimized. A total of 3691 Sentinels were built for the USAAF and the RAF. The Marines received 306 Sentinels, which played a part in the advance in the Far East. The Sentinel was also adapted as an ambulance plane. Many Allied soldiers owe their lives to the Sentinel!

Although Sentinel was its official name, the aircraft was occasionally called 'the flying Jeep'. Production of this plane stopped in November 1945. Many of these aircraft eventually found their way to private owners.
The Stinson PH-PBB (Prince Bernhard Bravo) was built for the USAAF by Consolidated Vultee Aircraft Corporation in 1944. The aircraft later entered RAF service and was acquired by His Royal Highness Prince Bernhard in late 1944. In that year she received the Dutch aviation register PH-PBB. Up to 1966 the aircraft remained the Prince’s property, who frequently used her for his visits to units of the armed forces.

The foundation Royal Netherlands Air Force Historical Flight is currently operating and maintaining the PH-PBB.