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First-Class Mail International – USPS
https://www.usps.com/international/first-class-mail-international.htm#:~:text=Send%201%20oz%20letters%20or,the%20postage%20price%20goes%20up.
Send 1 oz letters or postcards around the world with one Global Forever® stamp, which currently costs $1.40 and never expires, even if the postage price goes up.
Postage Rates & Prices – USPS
https://www.usps.com/business/prices.htm
Cost of First-Class™ Stamps ; Letter Stamps ·, rectangular envelopes. From $0.60 ; Postcard Stamps ·, rectangular postcards. From $0.44 ; Global Forever® ( …
USPS Postage Rates – Stamps.com
https://www.stamps.com/usps/current-postage-rates/
First Class Mail Letter (1 oz.) – Metered Mail/Stamps.com Rate, $0.57 ; First Class Mail Letter – each additional ounce, $0.24 ; Postcard, $0.44 ; First Class Mail …
US Back of Book Air Mail Stamps for sale – eBay
https://www.ebay.com/b/US-Back-of-Book-Air-Mail-Stamps/680/bn_2309818
Get the best deals on US Back of Book Air Mail Stamps when you shop the … Free shipping on many items | Browse your favorite brands | affordable prices.
Us Airmail Stamps C1 for sale – eBay
https://www.ebay.com/b/Us-Airmail-Stamps-C1/680/bn_7023234627
nystamps US Air Mail Stamp # C1 Mint OG NH $120 L29x2584. $0.01 ; nystamps US Air Mail Stamp # C1 Mint OG H L29x2582. $0.01 ; nystamps US Air Mail Stamp # C1-C3 …
1918-23 First Airmail Stamps, set of 6 for sale at Mystic …
https://www.mysticstamp.com/Products/United-States/C1-6/USA/
In June of 1918, the airmail rate was reduced to 16¢ for up to the first ounce (this charge included a special delivery fee) and 6¢ for each additional ounce.
USPS Air Mail Red Forever First Class Postage Stamps …
https://www.amazon.com/Commemorative-Forever-Stamps-USPS-Sheet/dp/B07GML5N7Y
Buy it with ; $37.95. Only 2 left in stock – order soon. Sold by The Perfect Stamp and ships from Amazon Fulfillment. ; $17.99. Only 2 left in stock – order soon.
United States Stamp Values – 1918-1948 Airmail Issues
http://values.hobbizine.com/stamps/us-air-1918-48.html
6 cent, Orange, $82.50, $29.50 ; 8 cent, Propellor- dark green, $30.00, $15.00 ; 10 cent, Dark blue, $2.85, $0.45.
US Stamps – C – Air Mail for sale | Arpin Philately
https://www.arpinphilately.com/cat/us-stamps-c-air-mail
Air mail or Air Post stamps were used for the prepayment of postage for the premium service on all mailable matter sent by airmail. Inaugurated in 1918 U.S. …
US Airmail Stamps | Collectors Weekly
https://www.collectorsweekly.com/stamps/airmail
Mailing a letter cost eight cents per zone, so stamps were made in denominations of 8, 16, and 24. In February of 1926, the Post Office contracted private air …