Mit zwei Rolex in die USA ist viel problematischer als zurück.

Hier, von der Seite der US-Amerikanischen Zollbehörde:

This means that genuine Rolex products can only be imported with the permission of the trademark owner, Rolex Watch U.S.A. Inc. A private individual can hand carry one Rolex watch from a trip overseas without obtaining permission. Bring in more than one, and they will all be seized as a trademark violation. Purchasing a Rolex from overseas by mail is also a trademark violation.