Hermann Oberth
At this time Berthold Seliger began to build rockets in this society, which was renamed the Hermann Oberth society. In 1961 Berthold Seliger created his own company, the Seliger Forschungs- und Entwicklungsgesellschaft mbH, which cooperated with the Hermann Oberth society. The Seliger Forschungs- und Entwicklungsgesellschaft mbH developed several two- and three-stage rockets, which could reach heights of up to 150 kilometers, between 1962 and 1963. After a disputed flight demonstration of the Seliger Forschungs- und Entwicklungsgesellschaft mbH militarily usable rockets before military representatives from non-NATO states at Cuxhaven on December 5, 1963, a break between the Seliger Forschungs- und Entwicklungsgesellschaft mbH and the Hermann Oberth society occurred. The latter continued to make rocket launches until June 1964.