Believe it or not..... the first Bule Angel that Mr. Kato built was in 1963. There was 4 versions of this plane that he did. The 4th one is the one known as the MK Blue Angle kit that was offered in 1971.

Mr. Yoshioka built a Blue Angel and modified the tail of the plane from the original Blue Angel. He called this plane Blue Angle Modified. This plane won him the World Championship in 1973. The "Speeda" is this version of the Blue Angel.