WATCH POP

I've seen these on occassion. Are these a separate model (if so, anyone with a #?) or is the tachy bezel replaceable? Any info much appreciated.

tia, MM
...insert is replaceable. This configuration does tend to fetch a premium (as does the insert by itself), as it is far less common than the standard Tachymetric version.
Here is yet another seminal article by Chuck Maddox on several different types of chronograph bezels--hope you find it interesting.
Best,
T. "It's just a muscle. Only it is the main muscle. It works as perfectly as a Rolex Oyster Perpetual. The trouble is you cannot send it to the Rolex representative when it goes wrong. When it stops, you just do not know the time. You're dead." -- Ernest Hemingway, Across the River and into the Trees Don't know if you saw the post in the chrono thread earlier today, but if not check out K-Town Greg's pulsations scale Speedy- here.com/index.php?t=msg&goto=1905827&rid=1879#msg_1905827