We obtained these pieces from someone who worked at IBM in the 1970s-1980s.Receive the lot of 6 pieces shown.

1. One lid for the module measuring 31.73mm x 18.94mm
2. Three modules larger modules measuring about 31.73mm x 18.94 mm (I did not measure each one, but they line up as the same size)
3. Two smaller modules measuring about 28mm x 13mm

Great for a collector of vintage computer/electronics.
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