United States
Now showing: United States - Postage stamps (1847 - 2025) - 2 stamps.
1. May WM: None Sheetsize: 20 Design: Greg Breeding Engraving: Ashton Potter (USA) Ltd. Perforation: 10¾
![[The 100th Anniversary of the Beginning of Regular Airmail Service, type IAG]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/IAG-s.jpg)
11. August WM: None Sheetsize: 20 Design: Greg Breeding Engraving: Ashton Potter (USA) Ltd. Perforation: 10¾
![[The 100th Anniversary of the Beginning of Regular Airmail Service, type IAG1]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/IAG1-s.jpg)