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Also known as the "Blackbird," the SR-71 was developed as a long-range, high altitude, strategic reconnaissance aircraft. Flying at a maximum speed of 2,200 miles per hour, the "Blackbird" is one of the fastest jets ever to take to the skies. Developed and built at Lockheed Martin s super-secret "Skunk Works" testing facility, this revolutionary aircraft entered operational service in 1966. Measuring just over 107 feet in length, the SR-71 has a total wingspan of fifty-five feet, seven inches. Capable of climbing at a rate of more than 1,100 feet per minute, it maintains a service ceiling well above 85,000 feet, enabling it to successfully execute its vital reconnaissance missions. This coin salutes the SR -71 s important role in strengthening America s national security capabilities. Part of the Lockheed Martin "Skunk Works" Series, the obverse features a rendering of the SR-71 "Blackbird". The reverse bears the official "Skunk Works" emblem. Minted in a brass alloy, this coin contains an antique bronze finish. Each coin comes with a certificate of authenticity that details the history Lockheed Martin s "Skunk Works" program.