https://www.rugbyleagueproject.org/seasons/nswrfl-1975/round-7/easts-vs-canterbury/summary.html
CB: 11. Harris (see 0:46 + 1:03)
All other numbers for both sides seem correct, but the reserves listed for Canterbury do not appear in the video.
https://www.youtube.com/watch?v=m1LrzuWRVPA