cover 20pa. rose (white paper), clear handstamp, a horizontal strip of four on reverse of 1913 (18 July) envelope (reduced at left) registered to Constantinople and cancelled by "BERAT" c.d.s. in purple, also bearing Turkish Postage Due 2pi. (2) tied by arrival c.d.s. and showing registration and tax handstamps on front; some creasing and light staining nevertheless attractive and a most unusual franking. M.6a. Photo.