T.A.G air post stamp of French Guyana issued for the airmail route Cayenne to St Laurent, 1921, 75c on blue grey paper, unused stuck on large part of cover to St Laurent du Maroni, Guyane Francaise. The rare stamp (only 500 printed) has as usual some tiny faults. Yvert 4 = 1500 EUR (for an unused stamp). Certificate Roumet (Katalog-Nr.: 5)