Jersey Reds beat Guernsey Raiders 29-19 in a compelling clash to regain the Siam Cup in front of a crowd of more than 3,000 at Stade Santander International.
After going in 17-5 up at the break, Myles Landick's side withstood a second-half assault to lift the trophy for the 10th time in 11 years.
Earlier, Guernsey Raiders Ladies beat Jersey Reds Women 22-5 in a competitive Women's Siam, while Jersey took the vets Nash Cup 24-15 and the second-team Fallaize Cup 20-17.
It meant the hosts got their hands back on three of the four trophies after being 'greenwashed' at Footes Lane twelve months ago,
Watch Tony Curr's round-up of the 2019 Siam Cup