Hello Norbert,
Thank you very much! Interesting.
www.stammkennzeichen.de/ indicates for SZ+OU Ju 88
A-4 and in February 1941 it was apparently operated by Flugzeugfuehrerschule C11. The W.Nr. matches, however, 597 (I was looking for 0597 initially and missed the entry for 597).
From other W.Nr. close to 597, I would also say it was an A-5 rather than an A-4.
Regards,
Roger