Wikipedia
Wollensak
Wollensak was an American manufacturer of audio-visual products. At the height of their popularity in the 1950s and 1960s, many brands of movie cameras came with a Wollensak Velostigmat lens. Wollensak reel-to-reel tape recorders were prized for their robust construction and value. In the 1960s, Wollensak was the choice tape recorder for amateur home, school, and office uses. They were produced in both stereo and mono designs.
The firm was founded in 1899 by Andrew Wollensak to produce camera shutters. At its peak in the 1950s, it employed over a thousand people. The company had several owners, including Revere Camera Company and 3M Company. Wollensak ceased operation in 1972.