Screw Machine 12-destination dial switch. Black metal. Two bells.An antique office phone with 12-destination dial switch. Select-O-Phone and Select-O-Phone Junior were manufactured by the Screw Machine Products Company, of Providence, RI from 1918 to 1948, when the company was sold to Kellogg Switchboard and Supply, which continued to manufacture the phone until 1965. Inscribed on chrome transmitter and dial switch SELECT-O-PHONE JUNIOR THE SCREW MACHINE PRODUCTS COMPANY PROVIDENCE, RI, USA. Black metal. Two bells. Untested, otherwise overall good condition. � Issued: c. 1935 Dimensions: 10"H X 7.5"W X 4.5"D Country of Origin: United States