Lockheed EP-3E Electronic Surveillance Aircraft Keyboard
Posted: 28 Apr 2021, 00:21
Here is a keyboard that I recently bought from a seller on eBay who purchased a large lot of equipment from Lockheed. This was pulled from a Lockheed EP-3E which were used by the US Navy. 
Basically a keyboard for an airborne computer used for intelligence gathering, monitoring communications and radar. It is certainly well built as to withstand the rigors of some rough landings. According to markings inside the case it was manufactured sometime around 1984. No telling what kinds of action this keyboard has seen. It has definitely been well used but the Micro Switches (SW and SN series) are generally nice and smooth despite all of the dust and crud accumulated over the years.
The designation MX-10514/AYQ on the manufacturer's plate:
MX means Miscellaneous
10514 is the identification for this particular item
A = Airborne
Y = Data Processing
Q= Special or combination of types
Contract: N6092183CA023
Is this a PS/2 connector?
Micro Switch Illuminati confirmed 
Looks like something got spilled here 
Illuminated SN series switches
Most keys seem to have some kind of silicone adhesive on the stems? The keys comes off easily by hand though.
The best key of them all - End Mission
Craziest qwErtY design ever
Basically a keyboard for an airborne computer used for intelligence gathering, monitoring communications and radar. It is certainly well built as to withstand the rigors of some rough landings. According to markings inside the case it was manufactured sometime around 1984. No telling what kinds of action this keyboard has seen. It has definitely been well used but the Micro Switches (SW and SN series) are generally nice and smooth despite all of the dust and crud accumulated over the years.- 001.JPG (1.14 MiB) Viewed 2570 times
- 002.JPG (914.37 KiB) Viewed 2570 times
MX means Miscellaneous
10514 is the identification for this particular item
A = Airborne
Y = Data Processing
Q= Special or combination of types
Contract: N6092183CA023
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That's way more than I paid for the whole keyboard.