Seat belts

I recall that there is a recommendation that if a car is in an accident the seat belts should be replaced Would explain 69 belts in a 67, any signs of an accident?

I'll look at the labels to be sure I'm not hallucinating.
It struck me as odd.

There is no way these seat belts were changed.
I've pulled this car completely apart (including a cowl replacement) and know it was all "original"
No signs of any damage, ever.