I ran across this and other historical golf films on the USGA app included with my new Roku TV. You can also find them on YouTube. It's hard to believe how grainy and primitive the coverage was nearly 50 years ago. I don't remember it that way. I watched this and other major championships during my teens. This was the last time I remember Arnold Palmer (54-hole leader) contending in a major.
By USGA
HEADING INTO THE FINAL ROUND of the 1973 U.S. Open at Oakmont Country Club, there was a four-way tie for the lead, including Arnold Palmer seeking his second title.