Found this photo on a Dutch aviation forum: http://www.luchtschroef.nl/Vragenfoto%20AAMIJ.jpg (Click to zoom in)
The guy that posted it has no info, so maybe you can help..? The name on the back suggests it is pre-WW2.
It looks like part of an engineer's station inside an aircraft, and it looks like the top of the photo could be the top surface of the wing.
What makes this photo strange are the gauges and labels inside: all tekst is in French, but the three swiches bottom right are labelled 'Bosch' and the fire extinguisher also has German text on it.
Even stranger: The top left cluster seems to have a pair of almost everything, while the left 'Bosch' switch reads 'Front engine, rear engine, port and starboard' (In French).