#UC461973 15c Air Post Envelope Hot Air Ballooning
$1.75- $3.20 #UC481974 18c Air Post Envelope, red & blue
$1.75- $3.20 #UC491974 18c Air Post Envelope, red & blue NATO emblem
$1.75- $3.20 #UC501976 22c Air Post Envelope, red & blue
$1.75- $3.20 #UC441971 15c Air Post Envelope - Birds in Flight
$1.75- $3.20 #UC431971 11c Air Post Envelope - Jet Plane
$1.75- $3.20 #UC44a1971 15c Air Post Envelope - Birds in Flight, "AEROGRAMME" inscription
$1.75- $2.50 #UC391967 13c Air Post Envelope, red & dark blue
$1.75- $3.20 #UC581985 36c Air Post Envelope - Landsat
$1.75- $3.20 #UC561983 30c Air Post Envelope - World Communications Year
$1.75 #UC521979 22c Air Post Envelope - Moscow Olympics
$1.75 #UC371965-67 8c Air Post Envelope, red
$1.75- $2.50 #C1191988 36c Igor Sikorsky Airmail
$0.75- $72.50 #UC551982 30c Air Post Envelope - Made in USA
$2.00 #UC171947 5c Air Post Envelope, carmine
$2.50- $4.50 #UC541981 30c Air Post Envelope - Tour the United States
$1.75 #UC381965 11c Air Post Envelope, red & dark blue
$1.75 #UC511978 22c Air Post Envelope, blue
$1.75 #UC571981 30c Air Post Envelope - 1984 Olympics
$2.00- $3.20