5 ch. black on rose, perf. 10½, a fine example used on cover from Oroumia to Lincoln, Mass., USA tied by URMIA datestamp (13/8) in black. Reverse with Tabriz transit cds (19/8) and ´New York / Paid All´duplex (April 23).An extremely rare issue on covers mailed abroad, especially so for a Transatlantic usage.