Larry...
Thanks again for that... pity about the lack of codes. I suspect this is a long shot, and of course if anyone else could assist, that would be great, but we have the W.Nr.2725 for this aircraft. Might someone be able to match that at least to a factory Stammkennzeichen, if not an operational Verbandkennzeichen? I live in hope

.
Thanks again, though, for your help.
Kindest regards,
Paul