Lot 50308 – Legal sized registered cover franked with a single

Legal sized registered cover franked with a single 18sh on 10sh and sent by the US Legation in Teheran on 8 August 1886 via Enzeli 16/8, Baku 9/8(Julian) via Berlin and London as per m/s, and New York receiving mark 5/10/1886. Further US marks in m/s due to the onforwarding to other destination(s). A rectangular reg mark on front applied in Teheran. Two creases in the cover not affecting the stamp. However, to be noted the single rate is 6 ch and reg fee 12ch. The cover of legal size ought to have paid for double or triple rate. An answer why this heavy seemingly underfranked cover was accepted by the Teheran PO could be that the postal authorities did not want to charge the US Legation a postage due fee for the possible fault of putting too little amount! A very rare single franking. Signed Sadri at the side of the stamp.