Last clue
Powered by Siemens-Halske Sh.22B-2 radial engines.

OK, that gave it away. Do-19

And yes, I had to look it up.

Jim sorry but no "COOKIE" close though???

No stewardess this week
The answer - https://en.wikipedia.org/wiki/Dornier_Do_11

This weeks headache

Certainly appears to be an inverted V engine and the mount reminds me of 109 engine mounts....but I have no idea with that unusual looking cowling. Hmm?

Its not German?

Found it! It's the Edo OSE-1: http://en.wikipedia.org/wiki/Edo_OSE

Well done Harry.
And the coveted prize.