I always feel that courtesy and etiquette should be
universal?
Thank you once again, your explanation is very clear and you've
been helpful.
If you're the seller (instead of some ''stinky-old-bread''), I
would buy from you. 
Not too many Rolex owners know about the Oyster case
anyway.
Something is wrong.
Why would someone just buy a watch for $10,000++ and not know much
about it and then, sells it in a forum for $4,000? Strange, isn't
it?