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Topic - IBM receiver with flat area Posted: Apr 18 2020 at 3:58pm By New2brass |
Good reporting!
To the flat spot I have observed them on IBM. I would have to look if it was in a specific range. IBM only delivered for 9 months. they had only one serial number block 3,651,520 to 4,009,999. They did not use all their numbers. So tough to put it to a date even though some book estimate ranges. |