Tango Ballpoint 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 ballpoint is made from 925 sterling silver and has a small Square pattern on it`s silver body. The fittings are plated in ruthenium, which gives it a great contrast. The ballpen has a push button action on the top. This Silver Tango ballpoint pen is fully hallmarked and has an engraving panel alongside the clip. In luxury presentation box with 10 year guarantee, a silver cleaning cloth. Rollerball & Fountain Pen available. See below for matching pens, refills and accessories.