The Albatros L 79 Kobold was a single-seat Germanaerobatic aircraft of the 1920s and 1930s. It was a single-bay biplane with unstaggered, equal-span wings that had a symmetrical airfoil intended to ensure performance during inverted flight.
References
Book: Taylor, Michael J. H. . Jane's Encyclopedia of Aviation . 1989 . Studio Editions . London . 56 .