HaaTa's Siemens Tastatur 280 S 22241-F100-A12 GS 1 • The 280 S 22241-F100-A12 GS 1 sports (besides a catchy name) clicky, tactile, magnetic switches underneath huge keycaps. It uses a unique type of magnetic reed switch which is actuated when the poll becomes magnetized.
HaaTa's Ultrasonic • This Smith-Corona Ultrasonic I Plus turned out to be marvel of mechanical engineering. It is an "acoustic-sense" keyboard, using little slappers that hit a bar to encode a time difference which in turn will hit the transducers on either sides.
IBM’s UK Patent 1,016,993 • This recently rediscovered patent from 1963 shows a split non-staggered ergonomic keyboard design, which makes it pretty much the progenitor of keyboards like the Maltron, Kinesis Advantage and Ergodox.
Parak's IBM 4704 77-key keyboard • Parak poked everybody's eyes out with the rarest member of the IBM 4704 family, a tenkeyless IBM Model F keyboard, neatly resting in the original packaging.
Xavierblak's B-52 Stratofortress keyboard, the Amkey MPTK-129 • Xavierblak found this colorful vintage Amkey MPTK-129 keyboard from B-52 Stratofortress, which was then equipped by xwhatsit with a modern controller.
And the Wingnut for Best relic or discovery 2014, as voted for by the members of deskthority, goes to...