WAGR Qa class
The Qa class resulted from the rebuilding of Q class No. 140 with a larger boiler, and four-wheel trailing bogie added, and the fuel capacity increased (both water and coal). This rebuild started in 1903 and was completed in 1905 by Midland Railway Workshops, No. 140 having been selected to operate on the Upper Darling Range Railway which the WAGR had recently acquired.