Pix-O-Mat Four-Colour Ballpoint Pen A vintage Pix-O-Mat four-colour ballpoint pen, executed in chromed, solid steel base, the barrel incorporating an ingenious mechanism allowing the selection of four different ink colours within a single writing instrument. Models of this type gained popularity during the post-war period, when compact multi-function pens were prized for their convenience and technical ingenuity. Model: Pix-O-Mat Type: Four-colour ballpoint pen Material: Steel, Chromed Mechanism: Four-colour retractable system Condition: Excellent vintage condition. Accompanied by: No original box. Shipping: Shipped worldwide with tracking.