Quick-change and quick-set date

Quick-change and quick-set date. Quick-change means that the date changes over to the next day instantly almost exactly at midnight (as opposed to changing gradually over the course of several minutes before and after midnight). Quick-set means that you can set the date while the crown is pulled out to the second position rather than having to change the time in order to change the date.It says "ROLEX OYSTER" and "ORIGINAL ESCAPE VALVE". The new Sea-Dweller DEEPSEA seems to take all this writing, and put it on the front of the watch, creating a much busier face.Some other interesting facts about the Rolex Sea-Dweller, and Rolex in general: The Sea-Dweller is the only Rolex with a date, but without the date magnifier. This accounts for a lot of its popularity as many people love Rolex watches, but aren't crazy about the "bubble". The Sea-Dweller is the only Rolex with writing on the caseback. The additional thickness of the Sea-Dweller's case beyond that of the Submariner is to accommodate the helium escape valve.This may seem like an unnecessary detail, but it's actually a great, widely copied, and under appreciated design. It also makes the hour hand more easily distinguishable in low light. The bulbous shape of the hour hand which Rolex uses on many of their sport models allows it to be seen while directly under the minute hand. This extraordinarily beautiful watch is being discontinued. It is being replaced by the admittedly interesting, but very different Sea-Dweller DEEPSEA. I can promise you that there will always be a market for the "old" Sea-Dwellers, however. They were classics even before being discontinued. Most, if not all, modern Rolexes have the Rolex coronet etched on the inside of the crystal at the 6 o'clock position.