Hello,
Currently on ebay is a nice flight line of LFG Roland D.II machines at:
https://www.ebay.de/itm/Foto-Jasta-F...UAAOSwK8Nf2lNl
I would be very grateful if a reader with better eyes than mine can decipher any of the serial numbers.
The seller also has a photo of a Rumpler C.I of FF A 220, so possibly the Roland's belong to this unit as they are known to have operated at least one D.II, although the number shown seems surprisingly high if that is the case.
Regards,
Clint