From our collection ...
The airport in West Yellowstone, Montana, was officially dedicated on June 22, 1935 ... just a few weeks over 81 years ago. On that day, stamp collectors liked to mail out an envelope, usually addressed to themselves, in order to get the postmark commemorating the event. The postmark here includes interesting dates around a circle, "Official Yellowstone National Park Airport."
We had to smile because the sender used an "Air Mail" envelope for local delivery. We're pretty sure that was just to get the neat effect of the design around the edge of the envelope. We also like the classic luggage stamps that were used on the back.
There is one of these for sale on eBay right now at a rather ridiculous price. We are happy to have this one in the collection and actually like it better.