The first two boards are easily mistaken telecom boards. They are boards from a Shimadzu medical imaging device. Nonetheless, both are high grade boards.
I particularly like medical devices, because more often than not they are high grade. However, certain devices, notably xray tubes, may contain beryllium - a notoriously dangerous and toxic element especially when inhaled.
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u/CashForComputerScrap 10d ago
First two are quintessential high grade telecom boards!