ID: 
2589
Maker's Name: 
A.J. William Electrical Instruments
Where made: 
Australia
Dimensions: 
22.5 × 21 × 13.3 cm

Australian made laboratory instrument for measurement of DC or mains frequency alternating currents.

Range 5 - 40 A with 0.2% FSD error

Used by Royal Australian Air Force in 1970s.