Everything is shown on the front, as the back of the case assists as the bell. And remember it's a Spring Drive too. I asked why build it on the Spring Drive "engine"? They looked at me incredulously and said because it is the most accurate, smooth and co...
I am uploading the video now but here's a still shot of it (in my hand) 112 jewels! This is their reference bell and a miniature version they use to test the sound of the watches ( I think that's what they told me ). ...