Oertz-Werke Gmbh Max Oertz in Neuhof-Reiherstieg near Hamburg, Germany, an established builder of yachts, entered the aircraft business in 1911 and produced Wright machines.
They then built the Doppeldecker before another more well-known biplane. The company produced three examples of the mid-wing M1911-12 monoplane and a single developed M1912-13 model.
They built several flying boats and eventually sold the business to Hansa-Brandenburg in 1917.
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