Polaroid Eyewear Such glasses could screen out glare rather than simply darken the landscape. Land and Wheelwright contracted to begin production of Polaroid Day Glasses, a longtime source of revenue for Polaroid. With venture capital from railroad tycoon W. Averill Harriman and merchant banker and part-time songwriter James P. Warburg, Edwin Land, George Wheelwright, and Julius Silver incorporated Polaroid Corporation on September 13, 1937. Polaroid began the manufacturing of polarizing sheet for windows in railroad observation cars. In 1939 Day Glasses were the source of most of Polaroid's $35,000 profit. Although sales rose to $1 million in 1941, the company's 1940 losses
Polaroid Swinger correctly. Earlier models also displayed the word "NO" when not properly adjusted, while later units used only the YES indicator. The Swinger also included a built-in flashgun for AG-1 flashbulbs. The Swinger used Polaroid's 20-Series roll film, which was the first Polaroid roll film to develop outside the camera. Variants included the Model M-15 "Swinger Sentinel" (the Swinger II in non-US markets), which was a cheaper Swinger without the built-in flash, and the Model 3000 "Big Swinger", which used 100-Series pack film instead of the old-style picture rolls. The Swinger name was also used on several international-market Polaroid cameras in