#UC171947 5c Air Post Envelope, carmine
$2.50- $4.50 #UC361962 8c Air Post Envelope, red
$1.75- $2.50 #UC391967 13c Air Post Envelope, red & dark blue
$1.75- $3.20 #UC51929-44 6c Air Post Envelope, orange, die 2c
$0.75 #UC351961 11c Air Post Envelope, red & blue
$1.75- $2.50 #UC381965 11c Air Post Envelope, red & dark blue
$1.75 #UC401968 10c Air Post Envelope, red
$1.75- $2.50 #UC431971 11c Air Post Envelope - Jet Plane
$1.75- $3.20 #C671963 6c Bald Eagle
$0.20- $45.00 #UXC21958 5c Eagle
$1.33- $1.75 #UC341958 7c Air Post Envelope, carmine
$1.75- $2.50 #UC331958 7c Air Post Envelope, blue
$1.75- $2.50 #UC261958 7c Air Post Envelope, Blue
$1.75- $2.50 #U5431960 4c Pony Express Centennial Issue Stamped Envelope, brown
$1.75 #UC251956 6c Air Post Envelope, red
$1.75- $3.20 #1530-371974 10c Universal Postal Union
$3.50- $24.95 #UC601985 36c Air Post Envelope - Halley's Comet/Mark Twain
$1.75- $3.20 #C481954 4c Airmail Eagle
$0.15- $40.00 #UC451971 10c + 1c surcharge Air Post Envelope, red
$6.25 #UC32a1958-59 10c Air Post Envelope, blue & red
$2.00