This Dist-o-Map of Texas is the wheel that launched a thousand wheels! Well, at least 200 -- so far. These Dist-o-Maps are a common sight in the ephemera section of many junk shops and antique stores. We also have one for the Pacific coast.
The really amazing thing about this wheel is what's going on behind the scenes. My mind was fairly blown when I looked under the front disc.
It's kind of fun to play around with. McAllen is 920 miles from Albuquerque, but nobody needs to know how far Odessa is. You don't want to go there.
This is wheel is 7.5 inches across.