Vintage 1950s Vacuum Tube IBM Mainframe 700 Series Plug-able Logic Unit For Sale

Vintage 1950s Vacuum Tube IBM Mainframe 700 Series Plug-able Logic Unit

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Vintage 1950s Vacuum Tube IBM Mainframe 700 Series Plug-able Logic Unit:
$575.00

This 1950s plug-able logic module is from an IBM 700 Series Vacuum tube Mainframe Computer (most likely the 701).

The IBM ® 701 was a landmark product for the company and the world. It was IBM’s first commercially available scientific computer, and its first large-scale electronic computer manufactured in quantity.

It is in very nice original condition, no rust, with 8 IBM Twin Triode vacuums tubes (untested) still clearly display the IBM logos. The tubes could glow, given a 12.6V supply on the filament pins, the pinout identical to a 12AY7.

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