Hi. I was wondering if anyone had any experience with this on a Glashutte Panomatic lunar. For context I just bought this watch pre-owned a few weeks back and everything has been working great. While looking at the movement I noticed a small crescent shaped mark on the part that supplies the main spring from the main rotor. I do not believe it's dust but rather a small mark. What do you think it came from and should I be concerned or just leave it be? I have been wearing it for a couple days...

[Glashutte Original Panomatic Lunar] Odd mark on movement?