 It is the earliest known 35mm SLR camera ever to be built, but fewer than 200 examples were made.The actual launch date of the "Sport" is somewhat uncertain, however it must undoubtedly be one of the two earliest generally available SLR cameras using the 35mm film format, the other being the German Ihagee Kine Exakta, launched in 1936.It was manufactured by the Soviet camera factory Gosudarstvennyi Optiko-Mekhanicheskii Zavod, The State Optical-Mechanical Factory in Leningrad.