South Australian Railways No. 620 "Sir Winston Dugan" was the first of ten 620 Class 'Light Pacific' (4-6-2) steam locomotives that were built in 1936 at the Islington Railway Workshops.
The 620 Class were designed for hauling light passenger service as well as other traffic on the branch lines of the South Australian Railways (SAR).
No. 620 was put on show at the South Australian Centenary Exhibition in Wayville on March 6, 1936 and entered official service on June 26, 1936. It was used as an engine on the Centenary Train and named "Sir Winston Dugan" after the current Governor of South Australia at the time.
No. 620 was notable for being Australia's first streamlined locomotive. The smokebox was covered with a chromed steel grille similar to those fitted to motor cars of the period and it was painted in a resplendent Hawthorn Green and Silver livery. The press of the time described No. 620's appearance as 'a bit of fluff'. The nine remaining members of the class were unstreamlined.
No. 620 was eventually taken out of service and was cut up for scrap at the Islington Railway Workshops on July 5, 1963.
Even though this engine was scrapped, two of No. 620's siblings (No. 621 and No. 624) have survived into preservation.
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