Actually, to call this entry "vintage postcards of France" is perhaps a little misleading as, although they are of France, they are specifically of Boulogne-Sur-Mer. All were published by Levy Fils in the LL series. All of these postcards are postally unused so I'm not really sure of the date.
Boulogne-Sur-Mer, Le Cassino et la Terrasse, LL 119
Boulogne-Sur-Mer, Le Cassino et le Boulevard Sainte-Beuve, LL 315
See my vintage postcards website for more vintage postcards from France and other countries (Belgium, Egypt, England, Scotland, Wales, Ireland, India, USA, etc.)