Nassau Blue fountain pen ink made by P.W. Akkerman pen store in The Hague.
Nassau Blue is a rich, royal color that is purple leaning on the color wheel. It is an unfailing tone of blue-purple that shades in the prettiest of ways, fit for the Royal Leadership!
Originally made to celebrate their 100th anniversary, this ink comes in a vintage-style 60mL glass bottle with a narrow neck and a marble stopper that creates a well at the top to aid in filling pens, allowing you to get every last drop of ink from the bottle.
Made to be the background color of the Coat of Arms of the House of Nassau. The current King of The Netherlands is a descendant of the House of Nassau. The House of Nassau is a diversified aristocratic dynasty in Europe. It is named after the lordship associated with Nassau Castle, located in present-day Nassau, Rhineland-Palatinate, Germany. (Source: Wikipedia)