[ryanlol]

>One someones buy a fake watch, he is not buying the real one, so is there a win-win to everybody here?

I would think that this is extremely uncommon. I think the following scenario is more likely:

"X buys fake watch, X likes fake watch, X buys the real watch"

>who is the owner of the design?

The whole fake/not-fake thing usually has very little to do with the actual design of the watch, but the branding.

[SamReidHughes]

You're wrong, they infiltrate the supply chain, and catch unsuspecting consumers trying to buy the real thing. There are fakes all over chrono24, fake SARB017's recently found on Amazon, and there are a ton of fake Casio F-91W's.

[masonic]

  "X buys fake watch, X likes fake watch, X buys the real watch"

This explains all those people you see wearing two watches.