The Rolex watch is always thought safeguards that help prevent moisture and water from entering the case and damaging the precision Rolex movement. For instance, the typical Rolex watch will have a case back gasket, the nylon crystal gasket on watches supplied with sapphire crystals, and then the crown gaskets and case tube gaskets. If you do an experience on the Rolex watch you have, this resulted from gasket failure of these tube and crown.
It is VERY important that owners of Rolex watches have them serviced every 3 to 5 years to make sure that these gaskets are in good working condition. The replacement of gaskets is part of a regular service program. It is very IMPORTANT that if you see any signs of moisture forming on the inside of the crystal that you have the watch serviced. This is an indication that water has entered into the case. This needs to be corrected before any serious damage takes place and a valuable Rolex movement has been destroyed.
Maybe we have taken lots of times we get watches sent in for repair that has slight amounts of moisture within the case. However, we also get many watches where the owner has left the crown out and massive amounts of water have entered the case causing damage that simply can't be repaired. For example, when water floods the inside of the case, many parts begin to rust immediately. The hairspring on the balance will rust, all of the steel pinions will rust, and the polished steel screws will rust as well as all other steel parts within the Rolex movement.
For these very reasons, it is very important that owners of Rolex watches keep them in good working condition and follow a regular maintenance schedule. Many Rolex watches will also have dials and date rings that will become damaged with only minor amounts of moisture entering the case. Many people will be proud of owning Rolex. If we work hard on the Rolex watch, someday we will be proud of the fact that we are an "authorized" Rolex repair facility. Please try hard to know Rolex more and be a really fan of Rolex.