prachi
31
Confirming on my 7037 as well
Confirming with a photo of my 7037 as well. As others have said, I imagine it was placed there to ease the job of the watchmaker.
The Naked Watchmaker has
a deconstruction of the 7097 (the updated 7037) with lots of photos. Perhaps someone can figure it out using the information there.
-Prachi