Hello,
Currently on ebay is a photo captioned as a Romanian Spad S.XIII at:
https://www.ebay.de/itm/Rumanien-Rumanische-Ostfront-1WK-WW1-Technik-Foto-Flugzeug-Plane-SPAD-S-XIII-04/324333644994?hash=item4b83caacc2:g
X0AAOSwVRZfhwX J
Romania did not operate the Spad S.XIII and the personnel appear french, so either a Romanian Spad S.VII or a Spad S.XIII of a french unit?
Regards,
Clint