cover 1888 (c.) envelope (opened out and a little trimmed) from Nedjef to Teheran bearing fine Turkey 1884-86 perf.13½ 1pi. blue and pale grey tied by superb octagonal seal with double frame and matching c.d.s. in pale bluish green, shows serifed and non-serifed arrival c.d.s.; also a very similar envelope from the same correspondence, the adhesive is defective and the strikes less clear. Rare. Photo