This is an antique Stromberg-Carlson wall-mounted crank telephone. Manufacturer: Stromberg-Carlson Telephone Manufacturing Company, founded in 1894 by Swedish immigrants Alfred Stromberg and Androv Carlson. Type: Wall-mounted crank telephone. Function: Used for making and receiving calls in the early 20th century. Operation: To make a call, the user would crank the handle to generate a signal that would alert the operator. The operator would then connect the call to the desired party. Phone is an excellent addition to your antique collection. The phone does not work due to age.