Received this from La Baule, France a few days ago. Thank You François! La Baule is a seaside resort in Brittany on the western coast of France. The stamp used is from a limited annual collection of modern reproductions of classic French stamps: "Trésors de la Philatélie". In this case a 2017 reproduction of the 1957 10F stamp commemorating Henri Honoré d'Estienne d'Orves.
He was a naval officer when France was invaded by Germany during the Second World War. After the Armistice of 1940 he joined the resistance and established a spy network in France. But he was captured and eventually executed on 29 August 1941.