Advice on my broken 126600 50th

[LebDCI]

Hi guys,

Wish my first post here was under better circumstances.

I bought a Sea Dweller 126600 50th a year ago. I first noticed about 2 months ago that it stopped ticking while it was on my wrist (I was playing a poker tournament so I put it down to me being inactive and not moving my arm much although I did think it was strange, I've owned various mechanical watches of 'lesser' brands and this has never happened). It has happened a few more times since but has been basically reliable otherwise as you'd expect. Fast forward to today and the movement has completely given up. It doesn't wind at all, either manually by winding the stem or by movement.

Spoke to someone who knows more about watches than me and he said the only thing he could possibly think of is that I somehow got it wet without the crown being fully screwed down and the movement has rusted, but I'm so anal about care for my watches I just can't see this as a possibility.

For the record this is my second Rolex, I've owned a two-tone sub since 2017 and it is as reliable and perfect as the day I bought it so I know how the 126600 should be performing and I know to always screw the crown down etc.

My question(s) are (other than WTF I should do with this lovely non functional desk ornament I now own) has anyone ever heard of a new Rolex movement just completely breaking? Can it happen through dropping the watch or as the guy suggested getting it wet with the crown unsecured? Will this be covered under warrantee? What am I looking at cost wise for a new movement if Rolex determine that it isn't a manufacturing defect? Does this effect the value of the watch if it's had a replacement movement? I've heard of some Rolex service center horror stories.

Annoyingly the UK is in lockdown so I can't take it to an AD or Rolex for an indeterminate amount of time, so I'm here on Reddit. Any insight would be greatly appreciated and help put my mind at rest as I can't physically take the watch to any experts.

Forgive all the questions. I've just woken up and my watch is a brick and I'm sort of at my wits end.

<Tried to post a link to some pics but can't as I don't have enough points yet> - The 126600 during a happier time and with my sub.