World time watches are not only cool looking, but they are also useful. This particular system with a 24-hour ring is relied upon by a number of brands ranging from Patek Philippe to Montblanc - with prices all over the place (I believe Frederique Constant or Ball are the leaders when it comes to Swiss world time watch affordability).
I discuss the True Beat complication more in our article on the Jaeger-LeCoultre Geophysic True Second watch. Both the Geophysic True Second and the Jaeger-LeCoultre Geophysic Universal Time use the same base movement architecture. While the former contains the in-house made Jaeger-LeCoultre caliber 770, the Jaeger-LeCoultre Geophysic Universal Time contains the caliber 772. What I find interesting is that while the 770 has 270 components the 772 has just one more, at 271 components.
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With that said, the thickness of the 770 movement is 6.57mm, while the 772 is 7.13mm thick. That means there are some distinct differences on the top of the movement where the world time disc is. Otherwise, both movements have the same 40-hour power reserve, in-house made Jaeger-LeCoultre Gyrolab balance, and True Second "ticking seconds hand" complication.
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