Guernsey U21s beat Jersey 4-3 at Springfield to win the Ambassadeur Bowl for the fifth year in a row.
Will Fazakerley gave the Sarnians the lead midway through the first-half, before Jake Prince levelled for the home side.
After the break, Guernsey went back in front with an own-goal before Robbie Legg - playing his first match after 16 months out with a knee injury - found the net on his return.
Sol Solomon pulled on back for Jersey, but Charlton Gauvain raced clear and squared for Legg to extend the vistors' advantage.
Jersey captain Harry Curtis scored a fine goal late on to set up a tense finale, but Guernsey held on for a record-breaking victory.
- Watch the goals from the 2019 Ambassadeur Bowl