- Originally built as DD659 by Walkers Ltd of Maryborough, Queensland in 1913. This was just 12 years after Federation.
- After a re-fit in 1930, it re-entered service as D3 684.
- For half a century, it pulled passenger cars and freight across North-Eastern Victoria, travelling 1,457,884 km – a trip from the Earth to the Moon, and back – TWICE.
- It carried young men to serve at Gallipoli and the Western Front in WWI, North Africa and the Kokoda Trail in WWII, in the Korean War and Viet Nam.
- Led by Dr C. B. Officer, the Seymour & District Historical Society purchased D3 684 from Victorian Railways in 1967 at a cost of £300 ($600).
- With great support from the local community, the project was funded by public fundraising and subscriptions, with at least a third being contributed by Seymour railwaymen.
- In just eight hours, soldiers led by SGT C.K. Hall from Puckapunyal's 158 Tank Transporter platoon, and railway workmen led by Mr H.P. Ward, completed the move from the Seymour Loco Yards (now home to the Seymour Railway Heritage Centre) to its current home. The professionalism of the civilian and Army crews was noted by a commentator of the time as: 'a task, never before attempted in Australia, showing what Aussie teamwork can achieve'.