This is a mail from Phnom Penh to Corseul in northwestern France:
Cambodia has a large portion of her mail addressed to France. It is not hard for collectors to find covers with "FD" handstamp on the front. "FD" stands for "Fausse Direction", it is stamped by La Poste to indicate that the mail is incorrectly delivered (locally) which could be introduced by sorting mistake or unclear address. "FD" mail is usually returned to the mail stream and be delivered again.