The engine is very reminiscent of the 160hp Daimler Mercedes range which started out as a 150hp design circa 1914, and 215hp by the end of the war. Its not easy to see on my old mobile phone scrern, the early ones had 3 pairs of cast cylinders, later these were all individual for economies of repair (1916). Clearly these german / Austro-Hungarian fliers and mechanics are a risk loving bunch !