Please check my F-sub

[baron74]

Greetings!
My first post on this forum
I've bought this sub from fine reputation person for $4600. Only watches and the box. Actually I've already presented as gift it to my wife and ordered 2 straps

Made some inspection before buying:
- definitely Rolex caliber - the second hand runs smoothly; specific Rolex balance sound; 8 beats per second ticks; all caliber functions working properly
- the body and bracelet seems to be ok and their serials matches, the bezel shows 120 clicks
- the dial and hands seems to be ok

BUT (!!!) - after buying the watches, being at home, I was surprised that I can catch the crystal coronet by my naked eye. And even make a photo (!!!). Just putting my sub under the lamp, finding proper angle and shooting. Please look the last photo.
This is really disturbs me, because I heard this coronet near impossible to find. I can't sleep now

I'd really appreciate any comment from Rolex guru. Thanks in advance!

Here is the photos: