Other countries–Stamps of Slovenian interest

Yugoslavia

**,1733/4 U, 1733/4 F, Bl 18 F,Yugoslavia. 11th Communist Party Congress. Imperforate set and both stamps perforated and imperforate with background in silver instead of gold. Also S/Sheet with background in silver. Additionally a regular S/Sheet from upper margin in larger size (uncut). Stamps are MNH of good quality.