"May we send you our book?" That's polite.
According to Wikipedia, the New Britain Machine Company was founded in 1887 (or 1895), produced socket sets and tools for NAPA and seems to have had a hand in most American mechanic tools, Husky, Blackhawk, Mac and Craftsman, among others. The company was sold to the Litton Tool company in 1972. See the Duke's previous post here.