The black and white footage was taken at Hoburne Naish Holiday Park in 1937 and features a family-of-four and their dog enjoying the Hampshire coast.
The images were purchased at auction by Rosie Kennar, the family archivist and great-granddaughter of John Burry, who set-up the park.
She launched appeal to find the family, and, after featuring on BBC Breakfast and BBC South Today, the Hasberry sisters came forward— revealing the younger boy in the film was their father, Basil.
Rosie said: “It seemed like such a long shot when we started looking for the family, so we were just thrilled when they got in touch.
“The film is a remarkable piece of social history and would doubtless be interesting for marine historians and many others.
“But more than anything, it’s a unique record of that priceless thing— an idyllic family holiday.
“We’re just so happy to be able to reunite the footage with whom it obviously means the most.”
Hoburne Naish is one of Britain’s oldest holiday parks having been established in 1912.
“We invited the Hasberry family to stay at Naish so they could recreate the holiday enjoyed by their father and grandparents,” Rosie added.
“We’re a family business and we aim to make other families making unforgettable memories, so rediscovering something like this from so long ago has been magical.”
The 1937 footage features Robert Hasberry Sr, wife Dorothy, sons Robert and Basil, and Prince the dog enjoying a retreat away from their London home.
It also shows captions like: “Our bungalow was very pleasant, and we had all meals on the veranda.”
The 12-minute video captures a beach visit, sight-seeing and countryside walks— something the Hasberry descendants were able recreate when they came to stay at Hoburne Naish.
One of Basil’s daughters, Carol Williams said: “It’s been so lovely to come here, follow my family’s footsteps and do some of the things they did all those years ago.
“It’s a lovely spot for a family holiday and it’s been a beautiful way to bring us all together.
“They thought it was a great way to spend a holiday together, with the dog, and just do things outside— how it should be!”
Hoburne Naish now boasts elegant lodges and hot tubs, and Prince the dog would be pleased to know the park has recently been lauded in the National Dog Friendly Awards.