There are a fair number of core memory planes floating around, both on eBay and with people I know. They were compact and made nice souvenirs when computers wer

There are a fair number of core memory planes floating around, both on eBay and with people I know. They were compact and made nice souvenirs when computers were scrapped, so a lot of people held onto them. As far as "lost kingdom", I've seen a bunch of core planes from Russia recently; they probably kept them in service longer.