Patek Philippe

Question about Patek 570 Bezel finishing...

Hi Guys... Does anyone here know what was the original finishing of a patek 570>

I know that the watch side and lugs are brushed. Some of them are more mirror like now due to many years of wearing.

But what about the bezel? is it mirror finish or satin finish? Is there such thing as Satin finish? Just curious.

Thanks,

John