Greetings! I recently acquired a late 60's Seamaster chronometer. I was wondering about the original Omega crystal's signature. As you can see in the picture, it is visible at certain angles, but you cannot feel it when you run your fingertip across it. Is it on the exterior or interior surface?
It is interior - that is the reason why you don´t feel it. However I am not sure if you are able to feel it on the interior side because it is so tiny and shallow...