Yup, I was using that style in the 70's / 80's when I was SEABEE the ends are the giveaway. Early one had different ends on them. [UPDATE] Although now that I think about it, there was a mixed batch early on. I remember the duty belts we used on guard duty some times had the older belts. Like this one that was my Dads for long before I joined. He was in Korea and Vietnam so not sure when he got it.
The one I was issued was like the one you have and they were junk, broke often. mid 80's it was switched to a better steel ends before they went to plastic
Attachment 109217