Construction History
It was the North British Locomotive Company of Glasgow, Scotland which secured the order for the P class locomotives in 1924, ahead of several other companies including the Victorian Thompson & Co of Australia. North British was to supply ten locomotives with delivery inside of 33-weeks, which would be in time for the 1924/1925 wheat harvest when the introduction of the P class locomotives would free up other locomotives for use on wheat trains. Accordingly, six locomotives entered traffic in December 1924, followed by an additional four in the February 1925.
The next batch of ten P class locomotives were constructed locally in Western Australia in 1927, at the Midland Railway Workshops. They were identical to the North British locomotives excepting the short tenders rebuilt from those of the obsolete R class engines. This order was extended by an additional five locomotives which were delivered in 1929, giving the total-build for the class at twenty-five locomotives. Several exchanges of tenders occurred throughout the service life of the P and Pr class locomotives, such as exchanging the long tender of an unconverted P class locomotive for the short tender of a later Pr class engine.
The P class locomotives were given the numbers P441-P465 in order of delivery, with 451-465 being delivered with short tenders.
Read more about this topic: WAGR P And Pr Classes
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