The Audemars Piguet Royal Oak Obsidian Pen is an essential writing instrument for Royal Oak enthusiasts. Inspired by the iconic elements of the Royal Oak, the pen features an octagonal shape and is intricately engraved with a pattern resembling the legendary Tapisserie dial. The pen’s body features a distinctive grid pattern, which appears to be finely engraved onto the surface, giving it a textured and sophisticated appearance. The twist-top cap and clip are elegantly engraved with “AP” and “Audemars Piguet”. The underside of the cover box is serial numbered for authenticity. The Royal Oak pen uses Caran d’Ache refillable cartridges. Please note that the boxes may vary slightly depending on the year of production.