1938 LaF Portrait
1938 One 55c French stamp from 1938 featuring a portrait of Jean de la Fontaine and a panel showing WL. Scott France #351. $2.25 from Babette Omland, Daytona Beach, FL, through Ebay, August, '01.
I have been able to verify the Scott number on the web. I am afraid this stamp does not tell me more than that, even in 1938, the French liked to think about La Fontaine!