Issued by Belgium in 1973, this semi-postal commemorative (2F postage + 1F charity) honors Dirk Martens (1453–1533), one of the earliest and most important printers in the Low Countries. The design depicts a richly detailed 15th-century workshop scene, complete with a hand-operated press, typesetters, printed sheets drying, and even a small dog resting beneath the table. Printed in a woodcut-style illustration, the stamp celebrates Martens’ pioneering role in bringing humanist works and early printed books to Aalst. A sought-after piece for collectors interested in printing history, Renaissance culture, and Belgian semi-postals.