UNNY #222 and #223 INSCRIPTION BLOCK FIRST DAY COVERS FOR SALE: Click on the image text to return to where you were on the First Day Covers Page.
 

UNNY #222 UN Headquarters 1971 Definitive Inscription Block First Day Cover UNNY #223 Special Delivery Inscription Block First Day Cover
UNNY #222 UN Headquarters 1971 Definitive Inscription Block First Day Cover - $6.50 UNNY #223 Special Delivery Inscription Block First Day Cover - $9