Help with PCB ID

Josh Dersch derschjo at
Sat Mar 13 13:51:07 CST 2021

On Sat, Mar 13, 2021 at 11:43 AM Cory Heisterkamp via cctalk <
cctalk at> wrote:

> I’m wondering if anyone recognizes this PCB.  Double-sided, 74xx vintage,
> measuring 14”x15”. There’s a “B.I.” logo in one corner, but no google
> match. IC date codes are ’77/’78 vintage.
> There’s a pair of DB-25’s, a BCD encoder, and for some reason, two pots.
> DC rectification appears to take place onboard. I thought perhaps the
> 112-7753 marking might be a part or catalog number, however the flip side
> is marked 112-1754, so perhaps not.
> Anyone recognize it?  -Cory
My guess is it's a logic board from a Beehive International terminal.  No
idea what model though.

- Josh

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