US Army KEL-LITE flashlight 1990

Developed in the late 1960s by Donald Keller, the Kel-Lite was a highly-durable, weather- and shock-resistant flashlight, primarily constructed of heavy 6061-T6 aluminum (commonly known as "aircraft aluminum"). Though the company has been defunct since the early 1980s, surviving Kel-Lites are still in use worldwide. The basic final design was manufactured by Streamlight (to whom Kel-Lite was sold to when they closed) into the early 1990s. A similar model, also designed by Keller, is still being sold as the Brinkmann "Legend" series of flashlights.