According to Clive Law's book "The Inglis Diamond", yours would have been built in either April (up to 5T2047) or June (5T2048 to 6T2847) of 1945.
Also, back then it was not the Inlgis Washing machine co.....it was a company that made boilers and steam engines. During the depression, the company went into receivership, and in 1936, a Major Hahn, sensing that Britain and Canada were going to be purchasing weapons soon, bought the company and got a Bren contract from the Brits.
Washers and dryers were post war production.