Hello, I finally acquired my grail 2015 Patek 5396G-011. I noticed that the movement was only marked with a "324" whereas the photos and images on the Patek website show "324/303". I acquired the watch through a trade with a reputable AD. Although pre-owned, it arrived like new with boxes and papers. I was excited that my dream of owning a Patek came true but now I am concerned because of the marking on the movement. Could someone please help shed some light on this? Many thanks.