World War I German float fighter. Detailed exterior, engine, and cockpit. German markings: 1. Albatross W4 (early), w/n 747, Naval Test Centre Warnemunde, Oblt.d R. Friedrich Christiansen, August 1916, 2. Albatross W4 (early), w/n 785, Naval Test Centre Windau, October 1916, 3. Albatross W4 (early), w/n 786, Naval Test Centre Warnemunde, November 1916.