The listing, 2 First Day Covers - Sport of Ballooning - 1983 has ended.
Two first day of issue covers saluting the sport of ballooning (Artcraft envelopes)
Intrepid, 1861 and Explorer II, 1935; with a stamp for each - postmarked 31 Mar 1983, postmarked in Albuquerque, New Mexico (site of a large annual balloon festival)
Contemporary balloons - 2 stamps - dated 31 Mar 1983, postmarked Albuquerque, NM
(These two covers have slight bending on the tow left hand corners)