Once upon a time, those in the know could send and receive secret messages by the placement of the postage in various areas and configurations on their letter. The trick was to know what the different configurations meant, and that is now a lost art. Way back then, cards like this one taught that art. Too bad for us it's in Swedish.
423 views

Sweden Stamp Placement Postcard

Added to Curious Things and categorized in 2 years ago

Once upon a time, those in the know could send and receive secret messages by the placement of the postage in various areas and configurations on their letter. The trick was to know what the different configurations meant, and that is now a lost art. Way back then, cards like this one taught that art. Too bad for us it's in Swedish.