But production started in 1937 (E preface numbers), reached a high in 1938 (H numbers) with a continuing production into 1939 (I.H. Most sources indicate an availability for only three years: 1938-1940. Its images are in the rare 24mm X 24mm format. The Zeiss-Ikon Tenax of 1936-1941 was to be the director of camera design Hubert Nerwin’s masterpiece, combining high quality, precision and finish in a fast-operating and easily-handled, compact 35mm camera. The Tenax II: Zeiss Ikon's Precision Fast-action Camera see URL: This essay is a summary of the material covered in depth in my book Zeiss Ikon Tenax II from 1938 with 4cm Sonnar
