Retro look and feel, Modern technology About Us A fresh and innovative addition to the retail market, ProTelX (creators of the original GPO brand) was established in September 2009 with the aim of designing, developing and manufacturing high quality consumer retro products. GPO are specialists in bespoke manufacturing to meet specific needs for classic, yet contemporary retro inspired consumer goods. These products are chosen to add colour to your life; you want one because it's nostalgic and cool. You keep it because it's fun and enjoyable. GPO Carrington Classic Retro Push-Button Phone - Pull-Out Tray, Traditional Bell Ring Tone The GPO Carrington is a suave but contemporary, classic design Analogue Phone. This British Analogue telephone has just the right amount of 1920s decor, combined with modern technology.