How accurate can I expect my watch to be?

When it comes to accuracy there is one very important fact you need to know in advance. A $42 MWC Vietnam watch will keep time just as well as, and possibly better than, a top of the range MWC, CWC or Marathon mechanical or possibly even a $20,000 solid gold mechanical Omega, Rolex, or other high end watch.If that last statement surprised you, read the rest of this section carefully.All watches tend to gain or lose a few seconds over a period of time. These are small mechanical or electro-mechanical devices that are counting out 86,400 seconds per day. Even if a watch is 99.9% accurate, it will still be off by a minute and a half in only 24 hours! So even a mediocre wristwatch has to be well over 99.9% accurate to even begin to be useful on an ongoing basis.