No. 2 Omnigraph

A No. 2 Omnigraph at the Connections Museum in the Early Telephone History display

The No. 2 Omnigraph is an automatic telegraph transmitter introduced sometime between 1915 and 1920. It can send messages in original Morse code or Continental code, the refined international Morse code used today, depending on the discs used. It was used to train new telegraph operators as well as to increase the speed of established operators.

The Omnigraph was used by the US Government as well as universities and schools. Prices would range from $2.50 to $18.00 (equivalent to $59 to $428 in 2023) depending on the model.