This is a high precision resistance decade bridge with a total resistance of 1,2 megohms in different steps:
1 ohm (710 mA) - 10 ohms (230 mA) - 100 ohms (71 mA) - 1 kohms (23 mA) - 10 kohms (7 mA) - 100 kohms (1.5 mA)
The instrument is in mint condition.