Most Shaver Style G Dolphin base desk instruments were wired for two or more connections, up to 50, and adapted for general inter-communication between connected station using a push button buzzer call. However, this model had no other extensions tied to it, therefore it had no buzzer on the back. The scan is from an original image of the 1899 Public Telephone Company catalog listing the Shaver Style "G" Desk Instrument for $10.00. Extremely rare telephone and one of the most beautiful and unusual designs of all. The watchcase receiver hangs on a hook in the back. Size 11 - 1/2" T.