Is it real? Dealer said "counterfeit"

[Montebay]

Hi all,

I am not looking to sell this, or get it appraised by anyone here. I inherited it from my Dad and took it to the local Rolex dealer to find out about getting a link for the band and having it serviced. Their Rolex "guy" spent about 30 seconds looking at it, then told me it is a counterfeit. He said the dial is fake, and if he sent it to Rolex for service it would be confiscated.

So a little help please for a guy that does not know anything about the Rolex world. Is it possible that it's a fake, even with the box and tags, and the serial numbers? Could the dial be fake and the rest of the watch be real? If it's a fake dial, can a real dial be put back on without the watch being confiscated by Rolex?
Thanks for any help I can get on this.