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33731Re: [midatlanticretro] IBM Mark 1 tube plug boards on Ebay

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  • Mike Loewen
    Dec 22, 2013
      On Sun, 22 Dec 2013, Mike Loewen wrote:

      > On Sun, 22 Dec 2013, Mike Loewen wrote:
      >
      >> On Sun, 22 Dec 2013, B. Degnan wrote:
      >>
      >>> I am trying to determine these Mark 1 tube boards are complete and/or
      >>> authentic. Not yet confirmed. It this point maybe, but something does not
      >>> look right
      >>> http://www.ebay.com/itm/1951-MARK-1-IBM-TUBE-MODULE-/131073757653
      >>>
      >>> opinions?
      >>
      >> None of the pictures I've seen of the Mark 1 show those types of
      >> modules. They look more like the modules from IBM's 600 series machines,
      >> like this one:
      >>
      >> http://sturgeon.css.psu.edu/~mloewen/Oldtech/IBMtube-1L.jpg
      >>
      >> This one is from a model 604 Electronic Calculating Punch.
      >
      > Also, if you can ask the seller about part numbers on the module
      > itself, possibly on the long sides, it might be possible to track down.
      > Depending on the year, some 600 series machines had 6-digit part numbers
      > starting with 3 (3XXXXX), or something like 6-XXX, or IN-XX.

      I asked the seller about part numbers, and this was his reply:

      "Two of them have an "S" stamped in the metal...one has DPC and one has
      LMC...thats it"

      Not much help.


      Mike Loewen mloewen@...
      Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/
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