1874 10k Postal stationery envelope uprated with two 3k, posted on ship of the Russian Coast Mail line with « POTI-KERCH-ODESSSA » 14 July 1874 cds tying stamps and further strike on reverse (with backflap folded out to display), sent to England, fine and attractive The cancellation indicates the main ports of call: Poti, on the Caucasian coast; Kerch, in the eastern Crimea; and the main Black Sea port of Odessa. The sideways figure in the cds denotes the number of the port of departure (« 1 » = Poti)