Queensland State Archives posted a photo:
John Walker and three friends set up the Union Foundry of John Walker & Co in Ballarat, Victoria. In 1867 a branch was opened in Maryborough, Queensland, becoming Walkers Limited in 1869. In 1980 Walkers Limited was sold to Evans Deakin Industries. It was included in the purchase of Evans Deakin by Downer Group in March 2001. Amongst many other projects, Walkers Limited built locomotives for the Queensland Railways and ships for the Royal Australian Navy.
Queensland State Archives Item ID436320, Photographic material