Ed...
Thanks for your postings. I have, in a sense, answered my own question, as I now know (prior to your posting) that you have to register to access the
www.stammkennzeichen.de website. I had an horrendous time trying just to register, as it kept rejecting e-mail addresses (including a newly-created one), password, usernames and my home address details, which are written in a different order in this country to that on the continent; that alone was a minefield...
I have sent a mail to the moderator requesting assistance, but following your comments, best not to hold my breath, eh...
I took a look in at the LEMB site and that seems quite comprehensive, so when I have some spare time, I'll look into that further.
I note, however, that the two examples you've provided, are both 'S17' codings, and both originally from Luftnachrichten Schulen... do we see a pattern developing here...
Anyway, thanks again for your input.
Regards...