Nine of the men died instantly, and the 10th the following morning.
The inquest later revealed the men got off the train at the wrong side, assuming it would be the same door they had boarded the train.
A large bronze memorial plaque commemorating Private Jackson was uncovered two years ago by workers after a concrete deck was removed from the East Taieri home owned by Parry Guilford.
"It is no good to us. We want to give it to the family as it might mean something to them. It just sits there in my sock drawer and doesn't do much," Prof Guilford said earlier this week.
The Otago Daily Times was able to track a niece of the late soldier - Raylene Haraki - who used to live at the East Taieri property that her father Leonard Jackson once owned.
The plaque bears the full name of John Stanley Jackson next to a British Lion and Britannia, with the inscription around the medal reading "He died for freedom and honour", and was presented to family on the death of a soldier.
Mrs Haraki and her brother, Keith Jackson, were delighted to receive the plaque at the Dunedin Cenotaph yesterday.
"It is unbelievable, just unbelievable," she said.
The family were yet to decided what they would do with the plaque, but would get it professionally restored.
A plaque commemorating the death of the 10 men, who were buried in Devon and Cornwall, was unveiled at a memorial service at Bere Ferrers in 2009.
A New Zealand flag hangs at the nearby church.