[sdiy] what are these?

[geoff james]

hi all
24 pin dil MBM 2732A x 5 , each one has a white sticker with no's ranging from B5O to B54.
i got  these some years ago and think maybe they are from an OB8.
if so what might they be worth and how could one test these without a OB8.
regards
geoff james
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