Hello, I've decided to buy a vintage Omega, it's my first time buying and I'm a little overwhelmed/nervous about the number of scary fake watch stories I've read online. I read a magazine article that suggested using Chrono24 because it is more reputable than other online watch marketplaces. These are the two watches I found in my price range that I like looks of the best but was hoping someone here could give me an informed opinion about the authenticity and price. And help or advice would be greatly appreciated. First: $450 http://www.chrono24.com/en/omega/se...r=1&tab=details&urlSubpath=/omega/index-6.htm Second $563 http://www.chrono24.com/en/omega/vi...ails&urlSubpath=/omega/index.htm&watchTypes=U Thanks in advance for any help you can give me.