HHKB Lite Happy Hacking PS2 Keyboard Lite KB-9975 DIP Switch Portable Crash Cart 60 Keys.  This keyboard has the old SUN keyboard Unix layout (Caps Lock is replaced with the Control Key) This was used on crash carts in data centers for server maintenance.

Dimensions:  11.5" x 4.5" and the cord is 6' with a PS/2 Connector 

Please ask any questions you may have.  Thanks for Looking.