This item sold on July 4, 2013.
Talk about doing it old school, these air bladders have a valve in them marked A. Schrader & Son PAT June 06, 1916. Looking at the ads, they don't even advertise them. They focus on valve stems for tires. When you go out and rough it, you don't need to rough it too much, with your own pneumatic pillows. Who knows how old these are because there is no patent number, just the date. I "believe" that these are from the time in the roaring 20's where America started it's love affair with the car and with travelling by car and camping. I havent attempted to inflate these so I can't report on how well they hold air.