I recently acquired this 70's style panel. The square black "buttons" are actually 7 segment LEDs.. I don't know much about this panel but suspect that it might be from a nuclear power plant (the radiation event counter would suggest this). If you know anything about this panel, The Relay Trainer is a computer with the logic implemented with relays.
This is a "daisy wheel" from a daisy wheel printer. Ours was a Silver Reed printer -- I looked online and couldn't find a decent picture of the printer that we had. Here is a link to a Wikipedia article about daisy wheel printing.
This is a "print ball" from an IBM Selectric IO Writer. Mine looked like a regular IBM Selectric II Typewriter, but there as a large connector on the back (50 pins?) that I connected to a homemade IO board with transistors to drive the solenoids in the typewriter. Here is a copy of the IO Writer manual