The classic tele-sports III & IV Cartridge-Pong systems were manufactured by Radofin in Hongkong. Both systems were sold worldwide by companies like Audio Sonic (mainly the Netherlands), SHG Black Point (Germany), Radofin (worldwide) and Acetronic & Princetronic (the UK).

Here is a rare brochure that we found on ebay.uk
Our sincere thanks to Mr. & Mrs. Penney from South Yorkshire for sharing these scans with us :-)

For further infos on this system please check here