This elegant Cartier pen is a must-have for any collector of fine writing instruments. Made with high-quality materials and featuring a sleek design, this pen is sure to impress. Its ink color may be unknown, but its performance is top-notch. Whether you're a seasoned pen enthusiast or just starting your collection, this Cartier pen is a perfect addition. The brand speaks for itself, and this pen is no exception to their reputation for excellence. Add it to your collection today.