IBM 3158 66-key Display Console Keyboard
Provided by the ASK Keyboard Directory
IBM-made 66-key operator console keyboard for the IBM System/370 Model 158 mainframe computer's 3158 Display Console (also known as the 3158 Operator Console). It was integrated into the large platform the console's CRT display was attached to. The keyboard notably had a green "START" key and a red "STOP" key "IRPT" (interrupt) keys. It's also the earliest known IBM Model B (beam spring key-switch) based keyboard.
