. . . would make a nice addition to "my" peripherals forum's content content project.

( I've got a soft spot in my heart for this forum because the mod squad formed up this new Brigade and promoted me Brigadeer for my first Command, here in the 68kMLA [] ]'> )

Links to discussions about this curious peripheral, specs, interface protocol and some good pics with a ruler for scale would be much appreciated.

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Mac SE and Newton serial keypad