That is £572 in 2023 according to the Bank of England inflation calculator. Did mono radio cassettes of that size ever increase in price. Fast Forward twenty years and they were still about £40.
i owned a few Teleton units over the years, from a receiver over a tapedeck to a mono blaster. cheap built labeled crap, sorry
We didn't have Teleton over here but I've found some very interesting information. The 70's were wild times for electronics distribution, everyone was trying to get a foot in the door and the sellers were looking for newer exciting products to carry. http://www.teleton-electro-mitsubishi.com/histoire-teleton anglais.html In July 1970, the British press announced that Mitsubishi, the Japanese industrial giant, has just acquired 50% of Teleton Electro Ltd, its official distributor for Germany. Mitsubishi announces its ambitions: to generate a turnover of £ 9 million the first year, £ 25 million the following year ... The brand new company, simply called Teleton, markets under its name Japanese products "General Corporation". But Mitsubishi sees bigger: the Japanese wants to occupy the market of video recorders, car accessories, microwaves and office machines. Mitsubishi claims to hold about 50% of the UK television market and aims to introduce color. London's Teleton team is joined by a small staff of Japanese expats, Saito Yoshiki and Matsumura Hideaki. Via Teleton, the various Mitsubishi electronic products will be sold throughout the 70s in Europe. In 1977, there were Teleton branches in Germany, the United Kingdom, Belgium, the Netherlands, France and Switzerland.