Here's another pics of Honeywell Hall effect keyboard. Luckily overall condition is very nice, except cable doesn't exist.
Slightly differ from the previous one, so I post it here.
Switches: 4B3S * 103, 5B3S(latching) * 3 on capslock and 2 keys on the top right, 4B1S+6B1D on BLACK 2U 0 key,
6B1D works as stabilizer, I guess.
Keycaps: thick spherical caps w/o blank one. caps lock is not stepped one unlike other things I've seen.
PCB: SD-16238, CAT. LIST: 108SD 21-1, SER. NO: 04041, I have no idea.
Production date: there's 4 digit number 7941 on the PCB, 41 week 1979 I guess. but sticker on the bottom of case says 1-8-82.
inside pics