Hi guys,
all of a sudden I remembered this message and took a closer look to the picture. Definitely, it's not a D.VII. More over the fin and rudder d not have the classic Fokker shape. There is a phrase on the fuselage wich reads "Glück Auf", that in german stands for "Lucky", wich this aircraft was clearly not. Also, it says "Gelsenkirchen" as for the german city.
A true mistery!