The Elliott 803 computer (a little later) also used magnetic core logic; https://en.wikipedia.org/wiki/Elliott_803 Not sure if the principal is similar or not. (There was one down at the Bletchley computing museum many years ago when I went down)
Elliott 803 used mostly transistors, but it indeed also used magnetic cores for some of its logic gates. The operating principle was different than that of the parametron, but the end effect was about the same. It used highly non-linear magnetic cores, which could not be switched by one or a few current pulses coming through wires passing through them, but enough pulses would switch the core. This kind of logic gate,…
Thanks; I hadn't realised the 803 used a mix - what was the choice of which to use for a particular circuit?