The Cierva C.19 was a 1930s British two seat autogiro, designed by Spanish engineer Juan de la Cierva. It was built by Avro (that designated it Avro Type 620). It proved to be the most successful and widely-produced of the early Cierva designs.
Read more about Cierva C.19: Development, Operational History, Survivors, Variants, Specifications (Mk.II)