When It Absolutely, Positively, Needs To Get There Faster Than Sound

[K'Tesh]

Missile Mail...

A few possible scale possibilities are featured in the video.

 

[Tobor]

If only that had caught on.....

 

[kuririn]

I seem to remember reading that the Polish RP-3 rocket was used to carry mail as well. ASP has a scale model kit.

 

[jlabrasca]

R.R.R. Rocket Mail

Western Isles Rocket Post

Hidalgo/Reynosa International Rocket Mail