I would say that assuming it's a Royal Model O is a fairly safe bet even though it might possibly be a Speed King, so 10 points for Fleetwing. But I don't think that the plane has been correctly identified yet.

Uwe wrote:

I would say that assuming it's a Royal Model O is a fairly safe bet even though it might possibly be a Speed King

It doesn't have the tabulator key, so it is not a Speed King.

 

Fleetwing wrote:

On second thought, the radio operator (or is he navigator?) is likely wearing an RAF cap -- USAAF officer caps would have the eagle logo on the front. I think I was initially fooled because I was under the impression that USAAF officers tended to wear their caps in the air, while RAF officer flight crews wore the (more practical) skull caps. (This might have been a posed shot on the ground, come to think of it.) He looks more like a UK guy though -- maybe it's the Errol Flynn mustache.

Short Sunderland -- that's a good guess, since the setup (including the typewriter) looks more like something a long distance scouting plane would have. But the Sunderlands were operated by the Fleet Air Arm, not the RAF I think. So I don't know whether the guy is kitted out in FAA garb or not. Also, would a British plane have a Royal, or an Imperial?

I think I'll go with a Lancaster or Halifax. Since Uwe posted it, maybe this is an RCAF plane?

Ha. I was following the much the same train of thought, and started with the cap (influenced by the mustache as well) and then tried to pick a WWII Royal Canadian Air Force plane that might have had been used for recon. My plane knowledge is based on whatever I learned online at 1am last night.

Still waiting for the answers here.... 

Maybe this exchange will revive interest!