Columbia AT

Styled very much like it's primary competitor, the Edison Standard, the AT was one of Columbia's most popular machine.

Unlike the Edison machines, which had their feedscreews exposed, or very simple covered, the AT's feed screw is carefully protected inside the reproducer carriage arm.

The Trunion (the reproducer support arm) placed the floating reproducer in a nearly horizontal position over the cylinder. This allows the full weight of the reproducer to ride the recoding, enhancing the volume.