On second look, and considering it was the 60's, that may have been a guy. My momma was a pretty good hand, and the 50's and 60's would have been her era. Nerves melted on her. She can't hardly be around a horse or cow now.
They had strap on horns on most of those calves to. Looked exactly like what we use today. Might have even stayed on a little better.
I like old videos of cattle or horses. I remember as a kid, seeing people with a side arm spin to their rope, like some of the guys in the video.