The complete set in detail
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F6427DP
Marianne l'engagée : "Lettre Verte" (economic mail 20 gr.), green; vertically imperforated and selfadhesive stamp from coils, signature "philaposte"
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F6428DP
Marianne l'engagée : Priority Mail for France 20 gr., red; vertically imperforated and selfadhesive stamp from coils, signature "philaposte"