Aviation history: Pfalz-Otto biplane: The German pilot Bruno Büchner and a female passenger, in South West Africa. Add to clipboard 2331-1:009958 Vorlage: 1914 Part of Speyer City Archive (Archivtektonik) In: Speyer City Archive (Archivtektonik) >> VI. collections >> 233 Graphics and views (inventory) >> 233-1 Photo collection (inventory)