This photo features a French Classic Moth “Mariposa” (Spanish for butterfly) designed by Bertrand Warion, sailing in tandem with a Nantais Vintage Moth (blue sail) at the French annual Classic Moth rally and regatta which was held yearly during the early 2000’s. The strong sheer gives Mariposa a traditional look which suggests a traditional round bottom shape.
The photo above is an optical illusion as other photos reveal that Mariposa is actually a multi-chine plywood shape (a three-planker) with the bow sections developed and pulled up.
Mariposa has a flat rocker panel that starts just in front of the daggerboard case and a topside chine that curves up to meet the gunwhale about 600mm from the bow. The developed bow suggests this Moth was built using the stitch and glue method.