Editing Pertec XL40 keyboard (section)

==Sperry Univac type 3555-00 keyboard==
This keyboard for the Sperry Univac type 3555-00 part of the 1900/10 mainframe appears to be very similair to both Pertec XL40 keyboards above. According to the labels this was also manufactued by Pertec using Honeywell 
(Micro Switch) components. The Micro Switch production date reads "7943" putting it in the third week of October 1979. While the command keys are blue doubleshots here the keyboard uses the same layout with [[Micro Switch SD Series]] switches 4A3B, 4A1B and 6A1D. Notice the markings on the "tweeter" are identical to those on the Pertec XL40 Keyboard.

<gallery widths=250px heights=187px>
File:Pertec XL40 blue setup.JPG                                     | Sperry Univac type 3555-00
File:Pertec XL40 blue close front.JPG                               | Blue function keys and black alpha keys
File:Pertec XL40 blue Numpad.JPG                                    | Empty numpad section identical to keyboards above
File:Pertec XL40 blue PCB Traces.JPG                                | PCB traces
File:Pertec XL40 blue Microswitch Label.JPG                         | Micro Switch label on the plate
File:Pertec XL40 blue Label.JPG                                     | Pertec label
File:Pertec XL40 blue Model Number.JPG                              | Pertec label "Add Mach. Univac"
File:Pertec XL40 blue Speaker.JPG                                   | Tweeter identical to above Pertec XL40 Keyboard
File:Pertec XL40 Blue Keycap Print 0.JPG                            | Blue doubleshot function key
File:Pertec XL40 Blue Keycap 0.JPG                                  | Blue doubleshot back
File:UP9100 Sperry Univac 1900 10 System Operators Guide Nov80.pdf  | Sperry Univac 1900 10 System Operators Guide PDF
</gallery>