Hey, just thought I would throw this out there for you. I am an aviator and your S/N property tag cought my attention. Decided to give you the history of the company, and I am loking for the specific part. I found where to buy it (a company dedicated to the sale of surplus , obsolete aviation parts), but I can't seem to get a darn description of the part. I am very familiar with flight computer systems, but I can't seem to find this particular one. Can you make out the Manufacturers Part No.

All I can see is 5712-1, the serial number left me hangin'...could only find it for sale like I said...Anyway, here you go!
Company History
Sperry founded his first company in 1880 in Chicago. The Sperry Electric Company manufactured the electric dynamos and arc lamps that Sperry had invented as a teenager. Over the next fifty years, Sperry's staggering number of inventions prompted him to found seven more companies for the sale and manufacture of his novel devices. Among these were Sperry Electric Mining Machine Company, Sperry Electric Railway Company, Chicago Fuse Wire Company, and Sperry Gyroscope Company.
The war in Europe created a demand for gyrocompasses that contributed significantly to the growth of Sperry Gyroscope. The Allied navies turned to Sperry with their need to equip both surface ships and submarines with the compass. As a result of these sales, Sperry Gyroscope expanded its facilities, as well as its profit. All of Sperry's companies eventually evolved into the Sperry Corporation.
In 1955, Sperry Corporation acquired Remington Rand, an early American computer manufacturer. The company was briefly renamed "Sperry Rand," but in 1978 it decided to concentrate on its computing interests and reverted back to "Sperry Corporation." In 1986, Sperry Corporation merged with Burroughs Corporation to form Unisys Corporation.
http://www.fi.edu/learn/case-files/sperry-2710/company.html
Sorry I can't show you the part, I looked through 38 1/2 pages of parts, and couldn't find it. If I do, I will let you know (not that you asked, just thought I would check it out).
~Tom