Hello. In fact, there is a pin, it's just that it is satin-finished along with the CG, it is rather rough, and so it is hard to see.
If you enlarge and sharpen the photo, you will see its outlines, and in another photo, or live, you will see it unambiguously.
This effect can often be seen on the roller of the CG lever when it is almost invisible, if you look at the watch from the front, due to the decoration, but it is there.
No, there has never been a CG with a hidden PIN in some way, although, as you know, not on all models it contrasts with the CG in terms of trim.
I am more confused by how the tip of the lever sticks out, but I suspect that it will simply not snap into place.