The new training partnership of Bart Cummings and his grandson James is off to a flying start with the exciting Eurozone giving the pairing a first stakes win at Randwick.

The colt led all the way to win the Listed Rosebud (1200m) on Saturday, just a couple of hours after Streaking Comet gave the new management of the stable its first city win.

The Rosebud is a lead-up race to the $1 million Golden Rose on September 14, a Group One race firmly in the sights of Eurozone's owners who include long-time Cummings client and friend Dato Tan Chin Nam.

For 25-year-old James, the fourth generation of the Cummings family to be able to call himself a stakes winning trainer, the day was a milestone after his four-year apprenticeship.

"I felt this good when I was foreman for Bart," he said.

"I keep saying I have to give the boss a call but we are partners now.

"You pour your heart and soul into what I was doing for four years with Bart and it is no different now, I'm still pouring my heart and soul into it.

"This game is a labour of love, you have to enjoy these days."

There could be many more days to enjoy with Eurozone who could be headed for the Caulfield Guineas if he takes the right steps via the Golden Rose.

The $3.10 favourite beat Dissident ($9) by 1-1/4 lengths with Dowdstown Charlie ($41) another half length away third.

Second favourite Bull Point ($3.50) finished fourth and never looked like mounting a challenge.

The winner's rider Hugh Bowman said it had not been his intention to lead but Eurozone adapted well.

"I didn't push to be there and I think he would be a better chaser," he said.

"He's taken a pretty decent step up today and if he keeps doing it he could be a serious spring contender."