With 6-decades, four series dials for resistance 1, 10, 100 & 1000 ohms and 2-ratio dials. Two terminals are provided for using the series dials as on ordinary dial type resistance box. The galvanometer and battery key are fitted with contacts. Range of measurement is 0.001ohms to 1, 11, 10000ohms. Coils are non-inductively wound with manganin wire. Accuracy + 0.2% to 0.05% A grade.