Early poster showing the 420 on the Lac du Maubuisson, since frequently the venue for the annual 420 coupe d’automne

© Hervé Lohier, Webmaster, 420 Uniqua‐France 50 years of the 420 - Class celebrating in 2010
The 420 was designed by Christian Maury, in response to a specification drawn up by Aristide Lehoerrff and Pierre Latxague, chief sailing instructors at the Socoa sailing school at Saint Jean de Luz - Ciboure in south west France.