seiffert also participated in several non-championship formula one races during 1962–63, mostly for seidel's team. he generally qualified at the back of the grid, and when he finished races, it was usually also at the back of the field. he drew attention to himself at the 1962 lavant cup when he knocked john surtees out of the race, but his best showing was in his last formula one event, where he finished seventh, albeit 12 laps down, at the 1963 austrian grand prix.