Wow. I think I've won two now, but no images to post. Someone go ahead.

Mel. Thanks for the info on the source of the photo. I thought it looked a bit nose down. ;)

Me! Me!
How about this one?
http://users.erols.com/rcarpen/cpit2.jpg

HP 42 Hermes

Or a Blackpool Tram

Older that a Hermes, might be newer than a Blackpool tram (at least some of them). Yes it is an aeroplane cockpit / cabin.

Aeroplane or Airship? It looks like the command cabin from an airship. R100 perhaps?

zeppelin mk1?

As I said, aeroplane .. with wing(s). In some sense, modern for its age. Not British, not German.

An early Fokker perhaps?

Not a Fokker.

French. Latecoere 521?

(c1935)

Not a Latecoere 521.
Built much earlier.

I fear this is a very hard one. Perhaps only a prototype was built and this may be the only published interior photograph. I'll be generous with hints as guesses progress.

Looks like something Igor Sikorsky would have built while he was still in Roosia. The "Bolshoi Baltiskii" perhaps?

Not Russian. As far as know Sikorsky didn't have a hand in it. Built after the Great War.

Farman Goliath, and that's my final answer Regis. ;)

The Goliath's pilot(s) sat in an open cockpit in the versions I've seen. You're within a few years of the correct age however.

Not Farman, not French.

The big square thing next to the pilot's seat is a camera for taking survey pictures.

Just a WAG the Caproni CA.51 perhaps?

While "country of origin" was sometime misrepresented back in those years, the original engines and the larger ones eventually used were not Italian. Thus I claim it is not Italian. As best I can tell it was quite different from the CA.51 being a biplane and having just two engines.

Looks like a bunch of flowers on the left side of the tram driver's seat!! :}

Obviously IFR! :} :}

OK, OK. I'll go back to my own forum.........:{

Hard to believe, but maybe those "flowers" were the engine controls. Maybe, maybe...., but being inteded as a Forestry Patrol aircraft...... Yet another hint.

I'll be away much of the day. Might post a picture of the whole aircraft late this evening UK time if no one is even close. I think the machine is too obscure to make a good contest, sorry.

Perhaps the Dayton Wright FP-2?
Certainly fits the bill!
http://i25.photobucket.com/albums/c6...l/wrightse.jpg