North Korea. (★). 4 complete sheets of stamps 1980's on toned unsurfaced thin greyish paper without gum. Not listed in Michel, but in Scott, valued to 5-10 $ a piece. Theese stamps was only for use inland, very hard to find. Mi no 2786 x 49, 2674 x 78, 2690 x 78 and 2668 x 78. Minor damages. aprox. 2500 $