Now showing: United States - Postage stamps - 1960 - Echo I - Communications for peace - 1 stamps.
15. December WM: None Perforation: 11 x 10½
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![[Echo I - Communications for peace, type XX]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Postage-stamps/XX-s.jpg)
