Thanks alot guys for the info, really appreciate it.

it´s Kindernay´s Flying Circus UL aircraft, very well know Czech WW1 show team….
http://www.letajicicirkus.cz/letouny-a-piloti/default.aspx
http://www.facebook.com/pages/Letajici-cirkus/184896320638?v=photos#!/pages/Letajici-cirkus/184896320638?v=wall