And does it always exist? because I ve seen pics on the internet where the caseback doesn't show those marks. My pano has them but I never knew what they meant or stood for. thanks for educating me ...
I was curious about this when I bought my ochs und junior moon phase. Here is an interesting blog post from Ochs und Junior regarding the process of getting their cases assayed. And below are pictures of my ochs und junior in silver with the four marks (...