<Seeing how it's advertised as a 16 Meg module, it probably isn't <a particularly pretty example of core. In my opinion, the older <core styles - where the individual beads and wires are actually I'd be surprized, as that is huge for a core system. It's far to big for one plane. My guess is it's a 16k. Way back however EMC did corestore systems of disk sizes for rapid store/recall to replace things like swapping drums and rotating media systems. It would be fun to get something like that and have it working! Allison