This postcard can have a double-use and make the economy of paper. It can be used both by the transmitter and by the receiver who can then reply.
"This self-published postcard is identical on both sides. When it was sent to print, the printers got confused and called up to say I forgot to supply the front of the postcard. It can be used in lots of different ways and is even more fun when sent abroad". Sara de Bondt
