About 1000 people - former pupils, staff and board members - spent the weekend reminiscing and celebrating the Alexandra school's golden milestone.
Comments by ex-pupil Paul Lyons, of Auckland, summed up the sentiments of many at the jubilee.
"It's been a great catch-up with mates, the organisation of the weekend was superb and it's been neat to see the students in action. The performing arts they put on yesterday and the choir today were all very impressive.
I'll definitely be back for the 75th jubilee - they have wheelchair access, don't they?
" Jubilee committee chairman Alan Hamilton was elated with the success of the event.
"There's people from all around the world and all around New Zealand who have travelled to be here, so that shows you how highly they regard the school."
The biggest group at the event were those who attended school from 1962 to 1970, he said.
Celebrations began with a powhiri and get-together on Friday, followed by a barbecue, touch rugby tournament, art exhibition, performing arts display and dine and dance on Saturday.
The event concluded with a special assembly in the school hall yesterday morning, the cutting of the jubilee cake by former teacher Stuart Morton, of Alexandra, and the planting of three flowering cherry trees on the grounds, marking the school's past, present and future.
Principal Brent Russell said, although he had been at Dunstan for only about three years, he was aware it was a strong and vibrant school because of the collective efforts of the pupils, parents, staff, board and wider community.
He praised the work of the 20-strong jubilee committee, who had spent more than two years planning the event.
Dunstan was a relatively young school "but it has been moulded into something special ... The foundations laid by those who have gone will ensure the school's continuing success, " he told those at the assembly.
