Rolex 16618 bezel tyoes and bracelet types

[timlo]

Hi all,

I have seen 16618 (both black and blue dial ones) with bezels that have yellow, gold and white fonts. My question is which type of bezel is the more correct one? Or were they just mounted on 16618 randomly through different periods?
My second question is about the bracelet. When did Rolex stop using pin bracelet and switched to screws? (pin on removable links vs screws)

Thanks!