Twelve pieces 10-element bar graph LED displays HDSP-4820 circa 1974 1975

Description

Eight pieces 10-element bar graph array HDSP-4820 LED circa 1974 1975
date codes:
504 x 3
441 x 3
432 x 2
AS IS UNTESTED
some bent pins no broken pins
four have black plastic piece on bottom
these are stackable to make a long array
Item ships from Canada
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IMPORTANT!!!!!
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