Waterhouse's No1 stable jockey Nash Rawiller had ridden Glencadam Gold in two of his previous three starts but when topweight Efficient was accepted for the Metropolitan (2400m) on Wednesday, Glencadam Gold was left to carry just 53kg,which is out of Rawiller's weight range.
Berry picked up the mount and in a twist of fate, Efficient was subsequently scratched because of injury and retired.
Had Efficient not been in the race, weights would have been raised and Rawiller would have been given the winning mount.
But the top hoop was among those to congratulate Berry on his starring role. "He's happy as Larry for me. He's a champion bloke," Berry said of Rawiller.
Glencadam Gold, heavily backed from $3.50 into $2.80 favourite, dictated from the front and always had the race in his keeping.
He strode to the line 3 lengths ahead of Kelinni ($7) with a short neck to the Waterhouse-trained Reuben Percival ($61) in third.
"He's a top-class stayer," Berry said.
"I haven't ridden many but I rode Descarado, he won a Caulfield Cup and this horse can too."
- AAP