A classic Luxembourg postage due stamp featuring the grand ducal Coat of Arms with rampant lion in an ornate green frame. Issued in the early 20th century, this 20 centime value was used to collect unpaid mail charges. The crisp typographic “20 cent.” stands prominently at the center, framed by decorative corner elements and the inscription “à payer” at the bottom. A desirable example for collectors focusing on European dues, coat-of-arms motifs, or early Luxembourg fiscal-postal issues. Clean impression and strong color make it an excellent addition to a specialist collection.