Thanks Mel - That was a good challenge.
I went for Böblingen as I identified (probably incorrectly) the second aircraft in the line as a Klemm Kl 35. The manufacturer was based there - hence the guess
. If it is a Klemm, then there's also a link with the Zlin in that Zlin manufactured Klemm's under licence.
Here's the next mystery aerodrome. It has appeared in the list before - so probably very easy.
