UNITED NATIONS NEW YORK OFFICES 1989 25c UN Peace-Keeping Force IMPERF PLATE PROOFS, Scott 548Pl, superb never hinged mint marginal BLOCK of 6, with inked fingerprints on the reverse as a security devise, very fresh & scarce, only 70 pairs produced. (6 proofs)

UNITED NATIONS NEW YORK OFFICES 1977 25c Fight against Racial Discrimination IMPERF PLATE PROOFS, Scott 288Pl, superb never hinged mint lower left corner BLOCK of 4 with UN emblem in the margin, with inked fingerprints on the reverse as a security devise, very fresh & scarce. (4 proofs)