Hi Caspar,
many thanks for your detailed answer. Very much appreciated.
Sorry if I sounded a bit impatient. Of course it’s alright if you take your time, I’d hate to see you go crazy, can understand that...
I gave some points of view on this one 2 seconds issue, I see it’s adressed seriously. Couldn’t demand more.

We have a huge military history archive here in my home town, one of the biggest in Germany (Militärhistorisches Archiv Freiburg). I’ll go there and see if I can find something relevant about the topic. I don’t promise anything though due to restrictions on my time schedule, and after all, this probably is a case of needles in a haystack.
@J.Hartikka
Thanks for your interesting contribution!
Ave
Ritchie