North Vietnam. Accumulation used. Box with enomous quantities of mainly IMPERFORATED COMPLETE sets from end of 1980's and about 1990, also some older perforated material from the 1970's, and later perf stamps and sets.. E.g. thousands of the 1988 Fish set (mi 1896-1902, Zeppelin 1990 about 600 sets, Mi 1664-70 about 1000 sets, and much more. Catalogue value should easily reach the order of EUR 50000.