France color shift

Yellow shifted upward.

France postmark Hautes-Alpes

Hautes-Alpes is a department in France.

Gap Centre de Tri must be the post office.

France postmark Yvelines

Yet another French department is Yvelines.

France postmark Morbihan

Morbihan is another department in France.

France postmark Nantes

Loire-Atlantique is a department on France's west coast, and Nantes Eraudiere is the post office in Nantes, a city and the administrative seat of the department.

France postmark Charente-Maritime

Gémozac is a small commune in Charente-Maritime, France.

Population? Just 2,588 in 2008!

France postmark Savoie

Les Echelles is a commune in Savoie, France.

France postmark Ajaccio

Ajaccio is a city on the island of Corsica in France.

France postmark Lyon

Monplaisir is a district in Lyon, which is the third largest city in France.

France postmark Villeurbanne

Villeurbanne is a commune in eastern France.

Villeurbanne Les Charpennes must be the post office.

France postmark Montreuil

Montreuil is a subarb of Paris in France.

Montreuil Bas Montreuil must be the post office.

S. ST D. stands for Seine-Saint-Denis. 

France postmark Paris Austerlitz

Paris Austerlitz is a railway station in Paris, France.

Now, what's BD Hopital?