when I first started out with vintage Rolex, back then there wasn't as much information around or as easily accessible and needless to say in the early days I made a few mistakes. Fortunately watches were not as expensive back then and it didn't hurt as much as it would today. But experience has taught me to ask questions first and deal with reputable guys, and don't take everything at face value, sometimes its not what people say its a case of what they don't tell you, is the revealing element.