Tango Fountain Pen Silver Ruthenium Square Pattern. In 2018 it was Waldmann`s 100th Anniversary. To celebrate this event, they created another design to the already very popular Tango range. This silver Tango Fountain Pen is made from 925 sterling silver and has a small Square pattern on it`s silver body and cap. The fittings are plated in ruthenium, which gives it a great contrast. It has a screw cap system and is fully hallmarked. The Silver Fountain Pen also has an engraving panel. Including a luxury presentation box with a 10 year guarantee and a silver cleaning cloth. The Tango Fountain Pen takes standard cartridges or a Waldmann converter and is available as a Ballpoint and a Rollerball. The Tango fountain pen is now also available with an 18ct bi-colour gold nib in fine, medium and broad. Please allow up to 4 weeks delivery for 18 ct Bi-Colour Gold Nibs. Including free packet of 6 ink cartridges!!! See below for matching pens, refills and accessories.