Now showing: Mexico - Postage stamps (1856 - 2024) - 1 stamps.
17. February WM: 7 Perforation: 12 x 13
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![[Airmail - Inauguration of Astro-physical Observatory at Tonanzintla, Puebla, type ABR]](https://www.stampworld.com/media/catalogue/Mexico/Postage-stamps/ABR-s.jpg)
![[Airmail - Inauguration of Astro-physical Observatory at Tonanzintla, Puebla, type ABS]](https://www.stampworld.com/media/catalogue/Mexico/Postage-stamps/ABS-s.jpg)
![[Airmail - Inauguration of Astro-physical Observatory at Tonanzintla, Puebla, type ABT]](https://www.stampworld.com/media/catalogue/Mexico/Postage-stamps/ABT-s.jpg)
