Not sure, that was just a listing on eBay I'd found that illustrates what my clasp looks like. Its a long story how my dad came about owning this watch, but somehow I think you guys would appreciate it.
A good friend of my dad's bought this watch new and wore it for years. One day he was driving down the interstate and his engine made a funny noise. He pulls over and pops the hood. He doesn't want to scratch his Rolex, so he takes it off and sets it on the horn. He adjusts something on the engine, drops the hood, gets back in the car and takes off. Five miles later, the warning lights in his brain go off and he slams on the brakes. Pulls over again, pops the hood, Rolex is gone. Made for one sad individual. Well, that Christmas his lovely wife buys him an exact replacement. He's happy again. A year or two later, he honks his horn. Horn sounds funny (he must not honk his horn very often). When he gets home he disconnects the horn, turns it over on his workbench, out falls his original Rolex. So now he has two identical Sea Dweller's. Anyway, one day he's relating this story to my dad, and my dad asks if he'd be interested in selling the old one. Ever since then my dad's told me it'd be mine if I ever finished my degree.
Anyway, I'm not sure how the flip lock ended up not being on the Rolex. If what padi56 says is true, then my dad was misinformed when he was told the watch would have to be sent back to Rolex for a replacement flip lock. What do you think about the first eBay link I posted? That looks like the whole clasp assembly for a Submariner, but it looks identical to the clasp on my Sea Dweller.
My dad wore it for years without the flip lock, but it just makes me nervous. To me its like driving around without my seatbelt. Sure, probably nothing will go wrong, but I'm pretty screwed if it does.
Roadcarver: Would those prices be for a new one direct from Rolex? Would I go through a Rolex dealer (jeweler) to order that?