In fact, as long as it is a genuine watch, many watch lovers reported that they could not see the crown mark and suspected that their watch was a fake. But in most cases, the method is just wrong, because the crown mark is laser-engraved on the inside of the sapphire and can only be seen under certain lights. It's also small in size, so it's easy to overlook.
If the original watch mirror with the small secret crown is accidentally damaged and is replaced by the official Rolex service center, it will be replaced with a small secret crown with the letter "s", where the "s" stands for "Service" maintenance.
Many people find it difficult to accept this kind of Rolex that has had its watch mirror changed, even if it is an official replacement and has passed the test. This undoubtedly affected the circulation of second-hand Rolex, which in turn affected the brand's value retention rate and long-term reputation. Therefore, around 2009, this small crown watch mirror with an S mark was cancelled. Now, except for Rolex, who consults its official maintenance database, no one can tell whether the watch mirror has been officially replaced.
Rolex classics
The Rolex Milgauss series, the most "sultry" one, uses a green sapphire mirror developed by Rolex in 2007. When viewed from the front, there is only a slight sapphire crystal. green. Anti-scratch, colorfast, only for Milgauss.
Its light green color penetrates the entire crystal mirror, and the development process is extremely difficult. Rolex simply did not register a patent. Because it uses an extremely special green sapphire crystal, it is also called "green glass".
The price for replacing a sapphire crystal for a Rolex Submariner is around RMB 900, while the green glass specifically for “Milgauss” costs around RMB 3,300!