Julie Reay, of Hastings, didn't disclose how long she'd been involved.
Checking the displays had all their correct ribbons out, she barely missed a step as Mrs Davis signed-off her first prize in class 9875 - Teddy Bear, in fur fabric, jointed or unjointed, safety eyes preferred but not essential.
She had the only two entries in the classes, and there were no cash prizes like the days when the catalogues listed yards of $1, $2 and $5 offerings.
"Now it's just for love," she said.
Another volunteer was former president Peter Tod, who helped judge the show's first competition, the revived export lamb section which had 22 pens of three lambs each, judged on the hoof and on the hook, all in the same day.
The A&P Society's 2011 report calculated 330 volunteers had contributed a combined 9900 hours of voluntary labour, which might have cost about $250,000 if it were paid.
Mr Linn said the number of hours would have increased considerably for this year's show, including past presidents, some with show service dating back more than 50 years.
As hundreds of exhibitors pour into the showgrounds today, along with dozens of horses, ponies and their riders, another part of the historic show will be taking place on a farm east of the showgrounds, where competitors take part in the preliminary stages of the New Zealand Farm Fencing Championships.
The best qualify for finals of three events at the showgrounds over the following three days, including the Golden Pliers, being held in Hawke's Bay for the first time.
While some showers are forecast today and tomorrow, weather is expected to be fine on on Thursday and the public holiday People's Day on Friday.