A friend was in Germany for a month just before the virus struck. this trailer was there and it is one of the cutest Standy I have seen.
...... Inside almost done--Trolly top has opening windows & roof.doors need assembling--pictured above waley windows..galley 1/3 done Cross Bow in Build Journals....http://www.tnttt.com/viewtopic.php?f=50&t=54108
That looks similar to the Cadet, a European fiberglass trailer from the 1980s. There's also an aluminum trailer that looks similar and I think the name begins with a P. If I can recall it, I'll come back and edit.
Finally came to me -- Eriba Puck!
Eriba is still a functioning company and has came out with a retro trailer which salutes their original caravans.