Stig,
I only brought up von Manteuffel-Szöge because I feel certain I've seen a Walfisch with the markings we're discussing,but can't find it and so FA (A) 292b is on my mind. However with regards to the units von Manteuffel-Szöge served in it would appear FA (A) 292b was among them. I suspect like myself you've seen him with Jastaschule II and Jasta 35b,but this site indicates wider service,which seemingly would make sense. Would a pilot commonly go directly from a cavalry unit unit to Jastaschule II. Anyway here's the link
https://timenote.info/en/Wolf-Magnus-Manteuffel-Zoege
Regards,
Clint