Don’t Forget
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Don’t forget to give us a ring hence the knot in the phone handset.
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A piece of self promotion artwork that was distributed on postcards, a promotional practise very common in the 70’s, many art directors collected them on their office pin-boards.

You could also submit your promotional artwork to a company called Athena they had a nationwide network of poster shops, in fact I think nearly every town had one.
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Acrylic and ink Airbrushed on line board.