The listing, Vintage Yellowstone Postcard has ended.
Made out of material, similar to a postcard. I got these from my mother, who got them from my grandmother.
Haynes, Inc. made them (by marking on bottom).
Measures 31/2 " long and 2 1/4 ' high.
Frank J Haynes (1853-1921) and his son Jack Ellis Haynes, were considered photo historians of Yellowstone national Park.
It was in a photo album, so back got slightly damaged when I removed. Still a very nice item.
I have several more, that I will auction later, if enough interest.