For accurate work, in polished teak wood box and bakelite panel figured in white. Split brass contact blocks hold precision cut, interchangeable plug having moulded black bakelite fluted tops. Coils of constantan wire, double silk covered are wound co-efficient. Coils are connected with double nut system. Accuracy +

Range in Ohms         Total Ohms            No. of Coils

A       1-50                        110                         8

B       1-100                      210                        9

C       1-500                      1110                      12

D        1-1000                    2110                     13

E         1-5000                    11110                    16

F           1-10000                  21110                   17