There are also some much younger exhibitors, perhaps inheriting grandpa's prized collection or developing on their own time growing up on the farm, their enthusiasm also "amazing" Mrs Pask who says there is continually growing membership among the clubs that rotate the hosting of the annual expo, in Hawke's Bay, Manawatu, Whanganui and Horowhenua.
Among the exhibitors will be Jim Cooper who took to buying vintage tractors after retiring from his orchard on the outskirts of Havelock North.
Now 76, he has four Case tractors, bought from as far away as Edendale in Southland and dating back to the 1940s, which will be loaded onto a truck provided by transport operator Bill Nimon and taken to Takapau, where club members will start setting up the site from Tuesday.
He also has a Dexter and a Massey Ferguson in the shed he describes as "John Deere green, without a John Deere tractor in sight".
"It's amazing how much is still tucked away," he said, marvelling that there is also something at the shows he hasn't seen before.
"I don't think it's run out yet."
As well as the annual expos, he and many others also display each year at the Hawke's Bay and Central Hawke's Bay A and P shows, take part in a couple of tractor treks, and turn out for occasional historical events.
The first expo at Takapau raised $10,000 for the Hawke's Bay Rescue Helicopter Service, and this time expo will also support the SPCA, Alzheimers NZ and Cranford Hospice.