DAR Aircraft (DAR Aeroplanes) is a Bulgarian aircraft manufacturer, founded in 1912 in Sofia - Boujuriste. Their first aircraft was the DAR-1 designed by Prof. Herman Winter in 1925. His other models are the DAR-2, DAR-3 and DAR-4, a trimotor aircraft. After leaving DAR, Herman Winter worked at Fieseler, where he designed the aerodynamic properties of the Fieseler Fi 156 Storch. Prof. Cvetan Lazarov replaced Herman Miller at DAR. DAR continued production with the DAR-5, DAR-6, DAR-7cc, DAR-8, DAR-9 and DAR-10A until 1944.
However, the photo does not seem to be one of the aircraft mentioned.