Hello,
Currently on ebay is a photo giving a partial view of Gotha WD 2 Serial 257 of SFS Zeebrugge bearing the inscription Frauenflottenbund at:
https://www.ebay.de/itm/Foto-Belgien...YAAOSwJnxgIsxQ
In the background is Friedrichshafen FF 29 serial 209.
Regards,
Clint