First train balloon I've seen:

http://abpr.railfan.net/abprphoto.cgi?j ... 961111.jpg

That's pretty cool. It's actually a reasonable facsimile as well, lots of details considering it's a balloon. However, I think the valve gear has an issue or two. (Things will get real ugly about 1/2 revolution from where it is now... )


As for it being the only one... I'm sure nobody will be too surprised to see our little blue friend has also been made into a balloon.

http://www.eglobe1.com/index.php/2007/0 ... -balloons/

Scroll down a bit to find him, and sing along "He's a really useful balloon I've been told!"