Catch this clip of James playing to a sell-out crowd on Australia Day on the Sydney Harbour (2015) The song is 'Waltzing Matilda' - featuring John Foreman on piano.
Listed below, it is identified as a Schagerl Raven. At first I thought it was a cornet...but you can hear how versatile this horn is in his hands. Here’s another link: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-qjkCB_37PBY.html