Hello,
Currently on ebay is a photo of a Rumpler C.I in late war markings at:
https://www.ebay.de/itm/RPPC-Jagdfli...gAAOSw-oResDBT
Given the location of this photos by the same seller as Weigelsdorf in Niederschlesien possibly FEA 11 as the unit operating the aircraft?
Regards,
Clint