The weird stuff I keep finding: 19 bit core memory?

Now I'm starting to look through boxes to see if I have another 11/24 CPU. I seem to recall picking a second one up somewhere, I also want to see if I still have the driver board for the second Plessy core memory. Might be around, might have been pitched. So far I did find a box of DZ11's. Not sure why I have a dozen of them, they might have been from the USPS haul in days of yore. Anyone need a couple of DZ11's? The real weird one is a quad board H216. I thought it was a Unibus core memory board, but it's 8k*19 bits, which means it came from one place: An MA10 memory box. The only one I may have been exposed to was AI (the original KA10). So question: Did AI use MA10 memory boxes? Did any of that stuff survive? Anyplace else it might have come from? Weird stuff. Got a lot of it.... CZ