ID some core memory

steven at steven at
Mon Jan 1 18:03:23 CST 2018

Bill said
> Just curious...can anyone id the system that used these two types of core
> memory?  I am thinking the first is a hand-made custom core, but the 2nd is
> definitely from a commercial system.  Looks kind of IBM-ish but it's
> nothing I can ID.  It's not an IBM 1401 I don't think.
> Thanks
> Bill

It's not a 1401 core plane. Here are a couple of pictures of what (I am pretty sure) is a 1401 core plane that I have from my dad:
Close-up. Has a sharp molded corner and the grooves for the wires:

Refer to PDF page 12 of
for another photo of this.


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