I'm not a big fan of film watch spotting, but I have to recommend Infernal Affairs II. This is not watch spotting but more a watch fetish film, with long drawn out closeups . . . unfortunately only vintage Rolexes (maybe there is a Monaco in one scene, but it is incidental).

I dont really like Rolexes but this is done in such a cool way I nearly went out and bought one.... fantastic, fantastic film as well, I thought it was better than the first film, unusually for a sequel (yeah, I know, TESB).

PS: Also some very nice valve amps if you like that sort of thing.