The Philadelphia Inquirer had a feature on Jay Schwartz, who is behind the Secret Cinema movie presentations in Philadelphia, on 5/8/11, at pp A1, A4. The following is from the article: His [Jay's] eyes light up when he talks about the day he found 'Granite Stockings,' an hour-long film from the 1920s documenting the manufacture of silk stockings at a Philadelphia factory. On the very last frames of the film, it said, 'Produced by News Reel Laboratory, 1707 Sansom St., Phila., Pa.' And I knew who they were. They became Louis Kellman Productions, who made 'The Burglar' - a Philly-shot '57 noir starring Dan Duryea and Jayne Mansfield - and a couple of other theatrical films. But they were the leading industrial film studio in Philadelphia for decades.
Sofitel , 1707 Sansom St., Philadelphia, Pennsylvania, 19103, United States