Description:
Decade resistance box consisting of three dial switches valued at 1, 10, and 100 ohms, each with ten steps. There are also two small metal binding posts above the dials, and there is one large screw above each of the dials, as well. These elements are mounted on a hard rubber panel over a rectangular mahogany base. The internal resistance consists of five coils for each dial switch, mounted in the wooden case.
Was most likely used in the Harvard University Physics 3 laboratory course.