A test pilot gives a P-51 Mustang the final checks before its test flight at Renfew Airfield at Glasgow. After recently arriving from the United States, the aircraft will be tested at Renfew airfield before being taken to a dispersal area where a ferry pilot will send the aircraft to a Squadron or Group's operational base. Printed caption on reverse: '81361 C - A mechanic at Renfew Airfield, Glasgow, Scotland stands by while a pilot checks a North American P-51 before the test flight. This plane and many others were shipped from the United States for use in the ETO. If everything works, the plane is taken to a dispersal area where a ferry pilot will pick it up to fly to an operational base. 18 October 1943.' On reverse: US Air Force 1361st Photographic Squadron AAVS (MAC) Photo [Stamp].