The D&R records were a Chicago outfit, appearing in 1908, and were pressed from Leeds & Catlin matrices, as well as Columbia. Although among the first to market 2-sided discs, they certainly weren't the first. Aside from Victor's "Record for the Children" in 1900 and Columbia's brief 1904 series, Odeon in Europe also marketed 2-sided discs in 1904.
George Paul
