Indeed. But I was hoping someone here (including the RICM, where a matching board exists) might know more.That may be a tall order without any ID numbers. They were often stacked in little frames, and so the entire module with many boards would probably be more telling than a single board.
The fact that it appears to have been parted out of a larger 3-dimensional stack argues against a limited-memory system like a calculator or jukebox. The green woven PCB does look somewhat more modern than the era I'd expect this board to be from, based on the size of the cores. If it was IBM, it would have probably have been on the muddy yellow phenolic board they used back then. A bit more research shows this image, described as "Magnetic core memory from 1956 for SEL's ER 56 electronic reservation system" with the same 20 x 50 organization. That seems to be "Standard Elektrik Lorenz", not the Florida SEL that was acquired by Gould.Id say with the green fiberglass pcb, it looks more 70'ies-ish than 60'ies-ish. A lot of these boards were also used in lesser known systems like desktop calculators and such.
Google Translate said:Also, the core memory circuits are complete with transistors equipped. They differ for the two memory sizes are only slightly. The core planes (matrices) are 20 X 50 = 1000 cores (Figure 10) depending on the capacity, or with 10 X 20 = 200 cores. 35 such levels are merged into a memory block (Figure 11) inserted between the plug - in units into the frame and is connected by plug connections to this central link quickly. A cabinet takes four such partial memories with their entire electronic equipment.
I probably wasn't clear in my reply. It looks like my board is a variant of the SEL ER-56 core, probably from a later date:Nicolet was one of the last manufactures of core memory. They used 20 bit memories a lot for there various signal accumulators and computers. It doesn't look like a core from a Nicolet 1080 as these were more square than rectangular.