Aviatik (Berg) 30.25

The Aviatik Berg 30.25 came from a requirement from the Austro-Hungarian Army Command for a long range single-seat reconnaissance fighter designed by Dr. Julius von Berg.

It was completed in March 1918 and was basically a dedicated single-seat version of the two-seater Aviatik Berg C.I reconnaissance aircraft, which was also ad-hoc modified in some cases as a single-seat airplane with a single 8mm Schwarzlose 07/12 machine gun placed on the upper wing.
It had similar fuel capability to the C.I and had provision for the installation of an automatic camera plus two synchronised 8mm Schwarzlose 07/12 machine guns. Radio equipment was also proposed to be installed, but it was never carried out.
It was powered by a single 200hp Austro-Daimler six-cylinder engine and when tested, the performance it's said that was comparable to the one achieved with the Aviatik Berg 30.30, but no production order was placed.

Sources:
1. Salamander Books - The Complete Book of Fighters
2. http://www.aviastar.org/air/austria/aviatik_30-25.php