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15th Anniversary of the UN 1960-1961
Regular and Airmail Stamps (November 25, 1960)
This issue is notorious for the large number of deliberate “errors” produced by its printer, the Peckmore Bank Note Co. of Philadelphia — see examples below.inverted center
printed on gum side
double frame
wrong color
Souvenir Sheet (November 25, 1960)
UNICEF Surcharge (January 14, 1961)
‘OMS SNEM’ Surcharge (December 11, 1961)