This keyboard was featured in my Exploring the elusive IBM 4683 Matrix Keyboard P/N 76X0100 article, which was likely one of the first full teardowns of the keyboard published. I received the keyboard in like-new condition; it was originally NOS but previous owner u/drake9800 who had it for only a short time opened the keyboard to figure out what it was since no concrete background material on the keyboard existed before.

Original specs/details

Full Name IBM 468X POS Matrix Keyboard
Part NumberPart Number
The number used to describe this keyboard's specific release; usually specific for a target region, language or SKU, etc.
Market Model Name/Feature CodeMarket Model Name/Feature Code
The consumer-friendly model number describing this keyboard as a part of a range of products, usually irrespective of target region, language or SKU.
A designation from my own type naming scheme used to categorise this keyboard with or from others by their common features and market intent but may/may not be derived from official names.
4680 POS Matrix Keyboard
The name of the known switching mechanism that lies under this keyboard's keys.
Key Tronic capacitive foam and foil (tactile variant)
Original KeycapsOriginal Keycaps
The keyboard's original keycaps' material and text/symbol printing technique.
ABS with double-shot legends
The style of this keyboard's flip-out or extendable feet. If applicable, this may also state how many levels of height adjustment are available and whether the feet could be rubberised.
The protocol(s) this keyboard can use to speak to the host computer (eg, scancode sets).
SIO via RS-485
The keyboard-to-host connection. This is could be a description of a cable (its colour, whether its coiled, whether its detachable, and what connector is at its end) or the name of a wireless technology.
Grey straightened-style detachable 8-pin SDL to 8-pin SDL cable
Form FactorForm Factor
The standardised or universally acknowledged name for this keyboard's layout form factor.
Full-size matrix
Production Date 1980s
Acquisition Date 2021-06-21