Fun read. Though, at least here in the US, the 520 was the first ST and the 260ST was a very limited run that came after the 520. I think the 260 was intended

Fun read. Though, at least here in the US, the 520 was the first ST and the 260ST was a very limited run that came after the 520. I think the 260 was intended for the European market, but I still believe it was released after the 520 as a lower-cost alternative. I personally had a 520STFM and then a 1040STE. Fantastic computers for their time.