The Xerox 928-900451 is a keyboard that was used with the Xerox II line of computers and manufactured by Xerox. The PCB bears Maxi Switch Co. markings, and uses a 25-pin proprietary cable to connect to the computer. The keyboard has only been documented to have Maxi Switch Vintage Linear keyswitches, with a dummy switch used to stabilize the “return” key, and a latching keyswitch under the “lock” key.

The keyboard casing is a 2 piece plastic assembly held together by clips located on the bottom half. The switches are clipped into a metal plate that is secured to the top of the case by 4 screws on the distal left and right sides of the assembly. The PCB is mounted to the plate via metal standoffs secured by screws.

The keyboard: keycaps are white on black doubleshot ABS, with mold markings indicating that they were manufactured by Comptec. Keycaps are spherical, and are sculpted on the alphanumeric cluster. The numpad cluster keyboard: keycaps are a uniform, flat sculpt. All keyboard: keycaps have a textured top with smooth sides.