Diamond Direction in German South West Africa: Vol. 7 Add to clipboard BArch, R 1001/1364 File Okt. 1911 - März 1912 Part of Federal Archives (Archivtektonik) Enthält u.a.: De Beers Consolidated Mines, Limited. Twentythird annual report for the year ending 30th June, 1911. In: Mining and soil research >> Diamond direction in German Southwest Africa