Το twinlock system (για μέχρι 100μm/300ft) διαθέτει δύο τσιμούχες...
"one located inside the actual crown that compresses against the threaded tube attached to the watch case, and another rubber gasket that is located inside the watch tube. These two gaskets -one under compression from the watch crown, and another inside the tube encompassing the winding stem, prevents water and dust from penetrating the case. It has been noted that the gasket inside the watch tube keeps water from penetrating the case even when the crown is unscrewed. Despite this, it is important to keep the crown always screwed onto the case".
Στο Triplock system η Ρόλεξ χρησιμοποιεί...
"..10 different components to insure water tightness to 1000ft/300meters with the TripLock system. TripLock crown is distinguishable by being larger than thea TwinLock crown, and they have three dots below the five pointed Rolex logo crown. The TripLock system utilizes a larger case tube, and four rubber o-ring gaskets to insure water tightness. The first gasket is viewable when the Triplock is unscrewed as it encompasses the outside of the winding tube, but is hidden just inside of the crown. Like the TwinLock crown, the second o-ring is inside the crown and is compressed against the case tube. The third and fourth gasket is located inside the case tube encompassing the winding stem. These four gaskets combined with a thicker threaded case tube insure water proofness to a depth greater that most amateur diver can descend".
https://beckertime.com/blog/twinlock-triplock-or-what-lock-why-it-matters-to-rolex/Το Triplock, πάλι..
Και κάποια από τα μοντέλα στα οποία
χρησιμοποιείται χρησιμοποιήθηκε το καθένα (παλιότερες εκδόσεις, πρώτης γενιάς Twin/Triplock systems):
Και μια σχετική κουβέντα:
http://www.rolexforums.com/showthread.php?t=185344
