1971 Seat Belt Button Style

My question is about the two different seat belt button styles I have seen on some original belts.

Which seat belt button is correct for a late build 71 dodge challenger?

second seat belt button

Generally speaking the solid silver ones were used on all early built 71 belts up to about early December, after that both types were used and you can find both types even in the same vehicle, up to the end of 1971 production.

Thanks

If you need any, I have several originals in great shape, depending on what color the belts are that you need.

I also have dozens of them, if you need any, 69440

I will keep you guys in mind if I need some belts. I need to go through the belts I have to see what I might need.
Thanks