Russia. Two covers using the Caspian Sea Mail route between Baku - Enzeli. The first one sent on-board the Russian ship in Sep 1912 franked w 3+7kop cancelled w oval Sea Mail Post oval postmark BAKU ENZELI and via Teheran arrived Isfahan 12 X 12. Nice condition. Second item is a French ppc from Paris sent via Baku addressed to Enzeli 16 91908.