unused 1924 Harvester 600K. block of nine (3x3), the centre stamp showing "800" for "600" error, also 1921-25 Postage Due 5000k. on 5k. with overprinted inverted, and another with "5" of "5000" omitted, also two "Köztársaság" blocks of six showing paper fold errors

细节
unused 1924 Harvester 600K. block of nine (3x3), the centre stamp showing "800" for "600" error, also 1921-25 Postage Due 5000k. on 5k. with overprinted inverted, and another with "5" of "5000" omitted, also two "Köztársaság" blocks of six showing paper fold errors