He was a member of the winning Welsh team who beat the 1935 touring All Blacks.
Rees was also chosen to represent Wales against the same touring New Zealand team, but earlier in the year had already gained his first Welsh cap when he was selected to face both Scotland and Ireland in the Home Nations Championship.
His second international, at Ravenhill in Belfast, saw Wales lose to Ireland, the eventual tournament winners.
In 1936 Rees played in all three games of the Home Nations Championship which Wales won after beating Scotland and Ireland and drawing with England.
In 1938 Rees was approached to play for the British Lions in their 1938 tour of South Africa, but turned them down for financial reasons.