Item: Salem Air Mail Cachet Cover When Acquired: June 12, 2004 Acquired From: eBay.com Auction Cambridge, New York Manufacturer:   Age: 1930's Notes: The decal on the left was printed by the city of Salem and given out free to citizens as a way to advertise Salem when sending mail out of town. It is not known if this piece of mail made it through the post and was just never postmarked.