They can't seize your watch, however bringing it into an AD is a bad idea.
How sure are you of that?
Anyone check TRF lately? There is a 22 page thread discussing replica SDDS's showing up at AD's. What happens when clowns take their reps into an AD is they PISS THEM OFF.
The AD knows that the watch you just brought in represents a potential lost sale for them. In effect, all of the reps = lost revenue for them. In this economic condition, every penny counts.
If you read the 22 page thread on rep SDDS's you will find pictures FROM THIS FORUM... Taken by MEMBERS OF THIS FORUM... Read the discussion... Enough people are pissed off to be trying to track phone numbers, address's, IP addresses, etc.
So when they come knocking on the door here, just remember... it was all started by some ass clown who took a replica in to an AD.