cover 1890 (c.) double rate envelope registered to Vienna bearing second printing 2n. yellow perf. 12 and 10n. blue perf. 13 horizontal pair of both, tied by "PODGORICA" c.d.s. (17.2, year blocked out) and showing framed registration h.s. adjacent, reverse with red wax seals, Rijeka and Cetinje transit c.d.s.; small imperfections. Photo