Contains among other things: Expert opinion on the farms Hochfels, Okandu and Tsaobis, 1920-1923; proposals for the foundation of a farm company in South West Africa, o.Dat

Contains: among others: Memorandum about the foundation of a national observatory in Windhoek by Erich Schoenberg - Report by Erich Schoenberg about the expedition of employees of the observatory Breslau to South West Africa - Graphical representation of a round bearing on the radio tower area near Windhoek - Cost estimate by Paul Guthnick and Erich Schoenberg for the annual operating costs.