evansb's challenge
The cockpit shot is from a Spanish registered aircraft
The aircraft was made in the United States. Photo was taken in 1937
I must admit that it was all the levers that made me think tri-motor and the large 0 on the instruments on the centre panel that made me think it was Itallian of the 1930s, which had such markings.
So the connection is Spain late 1930s so it must be an American aircraft that was involved in the Spanish Civil War.
Two Pilots but it is not a DC-1 or DC-2 nor a Lockheed 10 and as it is not tri-engined it is not the Ford 4 so I will go for the Fairchild 91 which was involved but I am not sure about all those levers and instruments as the Fairchild 91 was a single engined aircraft.
Mel