1951-52 United Nations 500wn Korea - Italy (without crown) imperforate vertical gutter pane of 10, blue country emblems (also portions of flags and names of countries) and inscriptions inverted, red portions of flags printed on reverse, suggesting this pane found its way out of the printers through a back door (printer's waste), unused without gum, folded in gutter between stamps, v.f., spectacular error (Cat No. 154a-155a) (Image)

Est.$1,500