1906, Olympic issue 25 l. in vertical pair, with c.d.s. "ATHENS 9/ APR 11 19.." to special envelope "KOMITEN FOR SVERIGES DELTAGANDE I OLYMPISKA SPELEN I ATHEN 190 CENTRALPALATSET, STOCKHOLM", to Helsingborg, Sweden, with Athens registered label on reverse and on front Helsingborg registered label. On reverse 5 l. and pair 10 l. uncancelled. Light transportation marks. A very scarce.
