The Space-cadet keyboard came after the Knight keyboard.
Here's more photos of the Space-cadet keyboard, a brand new one.
For the key layout, see: Lisp Machine Keyboard Layout
For lots more photos of the space cadet keyboard, see: https://secure.flickr.com/photos/obra/sets/72157635353286814/
Thanks to Jon Snader for tip.
Symbolics Lisp Machine Keyboards
Hacker Lore Keyboards
- History of Emacs and vi Keys
- Space-cadet, Lisp Machine Keyboards
- Space-cadet Keyboard
- How to Create APL or Math Symbols Keyboard Layout
- Golden Glory of a Hacker: jwz, emacs, and Ann Arbor Ambassador 60 Terminal
- DEC VT100 Terminal
- Sun Microsystems Type 6 Keyboard
- Control Key and Capslock Key Positions in Old Keyboards
- The Idiocy of Happy Hacking Keyboard