cover 1872 XU5 (opened-out for display) registered from Athens to Constantinople via Piraeus, bearing Second Athens 80lep. carmine-rose (just cut into at top) cancelled "1" with origin c.d.s. and boxed "SUSTIMENON" h.s. adjacent and, on reverse, Turkey Postage Due 1pi. (applied across flap and torn through opening) cancelled by octagonal seal type with transit/arrival d.s. adjacent. Rare and attractive despite faults. B.P.A. certificate (1982). Photo.