accuracy

I hope this will be honest questions and a discussion about the world of watches and collecting them. I don’t wish to offend. Just gathering information and insights. I’m a very recent arrival in the watch hobbyist world. I’m interested in watches because they are a fairly logical extension of...

Having last worn a mechanical watch at school, many years ago, I recall its accuracy being around 30 seconds or so per day. It was a "Seiko 5", so a reasonable quality automatic. I was expecting a lot better from the Cosmograph Daytona, particularly with Rolex's claims of better than COSC...