Thank for the welcome!
Watching the coin carefully with the magnifier, looks like the shape is exactly the same of the nostril, only forwarded. If it is a hit, It has same angle e curves.
I post a bigger image to help the observation.

Watching the coin carefully with the magnifier, looks like the shape is exactly the same of the nostril, only forwarded. If it is a hit, It has same angle e curves.
I post a bigger image to help the observation.






















