This page is a photo gallery of lisp keyboards.
One of the first Lisp Machine keyboard, called Knight keyboard.
Photo and some info from Knight (TK) keyboard @ Source world.std.com.
The Space-cadet keyboard came after the Knight keyboard.
Here's more photos of the Space-cadet keyboard, a brand new one, partially disassembled.
Photos of the Space-cadet keyboard by webwit @ Source deskthority.net. Used with permission.
Thanks to Jon Snader (jcs) for tip.
This model comes after the Space-cadet keyboard.
Photo by webwit @ Source deskthority.net. Used with permission.
This model comes after the PN 364000, and is compatible to it.