Cherry B80-88AB
These are photos that UncleFan sent me of his B80-88AB keyboard. It uses 10° T-stem switches. Space bar is straight mount and is marked with a red dot. The serial number is 946688, and customer part number is F0000012 REV.C. It was made around 1980. The photos were taken after some switches were already removed.
The numeric keypad has a wide key (probably zero: the keycap is missing) which is supported by a pair of switches: a regular 10° T-stem (such as M51-0182), alongside a dummy low-force straight-stem switch. The dummy switch has a black stem instead of the expected white for 10°, and it lacks the customary paint dot marking to indicate its non-standard characteristics.
The equipment that used this keyboard remains a mystery.
Top; some switches are already removed, including the space bar switch
Label
Bottom of PCB
PCB stamp
Cherry branding and PCB code
ICs
ICs
Space bar switch on the right; on the left is an alternate action switch from B80-40AB