Series Arm : 1 – 5000 ohms  (16 coils)

Ratio Arms : 1000,100,10,10,100,1000 ohms.

Manganin Coils (Imported).  Made from heavy brass bar, thick bakelite board, sturdy plugs. Non inductive coils are series connected in the order of 1-2-2-5-10-20-20-50 onwards.