The Audemars Piguet Royal Oak pen is one of those watch swag items that very few get to possess. Designed after the most iconic elements on the Royal Oak, the pen has an octagonal shape and is fully engraved with a pattern resembling the legendary tapisserie on the Royal Oak's dial. While the pen is quite similar in design to the Caran d'Ache pens, the pen is much thicker than those and extremely heavy for a ballpoint type of pen —total weight almost 43 grams.