Help identifying component(s)

Hi, Win: I do recognize these, to a certain degree ... Those are the little "tin cans" that IBM used, back in the early to mid '70s, to enclose (encapsualte) their "medium scale integration" -- an earlier generation, before the "LSI" (Large Scale Integration" chips took over pretty much everything. These were used in virtually all IBM products of that day, from mainfames, to minicomputers, to control units, and even inside other intelligent devices, like the disk drives and printers, etc., for the "logic" on-board ... Notice how IBM mounted them on a little card, with a little connector ... this was an FRU -- a "field replaceable unit" -- that if anything inside any one of those "tin cans" failed, you just un-plug the whole little card and replace the whole unit. I have seen similar "tin cans" used in the IBM DisplayWriter, the 5100, 5110, 5120, the System/34 and System/36 models, and various IBM System/370 equipment ... though usually on larger circuit boards containing quite a few more "tin cans" than in this particular example. This could also be an early form of IBM solid state memory (when IBM replaced "core memory" with transistor-based memory), where you might find a whole bunch of these little cards, all plugged into a larger backplane to form a "board" holding 32K of memory, for example. Hope that helps, Mark S. Waterbury