Summary of Rolex Clasps:
1. Oysterclasp: on Oyster Perpetual, Datejust, and Sky-Dweller
2. Crownclasp: on Day-Date Presidential bracelet, and some Jubilee bracelets
3. Oysterlock Clasp: on Professional line watches (Submariner, GMT Master II, Yachtmaster, etc)
Features:
Easy link Extension: on some modern Oysterlock Clasps
Glidelock extension system: on modern Submariner, and Submariner Date, SeaDweller, and Deep Sea
Fliplock extension link: on modern SeaDweller and Deep Sea, and pre-modern Submariner and Submariner Date
