Last October, I posted a picture of my 8k memory module. Turns out I’m not the only local with magnetic core – the science teacher across the hall from me produced this little gem this morning for my edification.

Front – if you embiggen, you can see the cores.

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Back.

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It looks to me like a (10 x 4) x (10 x 4) = 1600 bit array – I googled for ’10 bit byte’, ‘395643 memory’ and some others w/o any luck. I don’t think it’s wise to assume 8-bit bytes, but just for purposes of comparison, that would make this a 200 byte memory card!