Mackay Boats started building the International 420 in 2011. Introduction of the 420 was preceded by 2 years of development and design to produce the fastest shape and best structure to ensure the Mackay 420 lived up to the same winning reputation as our winning 470’s.

In 1963, French architect Andre Cornu designed the two-handed centreboard boat as a modern high performance fibreglass planing dinghy which could be sailed by anyone. And the craft so influenced European sailing that the 470 is directly credited with drawing new sailors to the sport during the 1960s and '70s.