UNITED NATIONS (1976) Dove*. Rainbow*. Set of 10 imperforate progressive proof pairs. Scott No 271, Yvert No 262. From the UN printer archives. Rare!
AVAILABLE AT $100
UNITED NATIONS (1980) UN Peace-keeping force. Set of 8 imperforate progressive proof pairs. Scott No 321, Yvert No 315. From the UN printer archives. Rare!
AVAILABLE AT $100