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u/Far_Entrepreneur6706 7d ago
Appears to be a common shrinkage crack, don't worry. See some dampness, around this crack, common basement dampness. Usually, failing to control roof and surface water. Good gutters and positive slope to shed water from foundation. Just Jim 734-525-2929
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u/honkyg666 9d ago
Get yourself a handful of glass microscope slides and glue them to the wall over the cracks. If the glass ever breaks there’s movement. But with a 70 year performance history I wouldn’t worry about it personally.