After the Nazis forced the Jewish owners of the company Stefan Bing and others to sell their shares, they moved to Britain and founded the Trix Ltd London, which initially used the same system.
Unlike other systems, such as Märklin H0 (still produced today) and Hornby Railways, the outer tracks were insulated, using the centre rail as a common pick-up.
The British Trix Twin company changed to DC in 1956, abandoned the three rail system in the early 1960s and disappeared altogether after a number of take-overs and mergers during the 1970s.
Apart from the centre pick-up, the Trix Express system also retained the larger wheel flanges, customary in the 1930s, right till the recent end, making derailments rather uncommon, but at the same time making their rolling stock incompatible with more modern two-rail NEM systems.
The Trix Express system still has a large following in countries such as United Kingdom, Germany, and the Netherlands with active clubs, and is readily available on eBay.