- With the Expert Deluxe Blue Rollerball, people can show their high ambitions and superior taste. The expertly crafted rollerball nib unites the tradition of liquid ink with ultimate comfort and convenience. The conical silhouette of the barrel and the engraved, contoured stripe pattern of the cap, inspired by timeless menswear, add French flair, confidence and authority to any writing occasion. The metallic blue lacquered barrel, the signature Waterman double-branch clip and the slanted cap combine to provide a pleasant writing experience, The Expert Deluxe Collection – A Reflection of Ambition