This case was used by Jaeger only, not LeCoultre nor Jaeger-Lecoultre, which used another case for their Diving Chrono, the " Shark ".
Actually, this is not the only watch to use an outsourced case, the other most famous example being the ..Polaris, but in this last case, the dial was specific to the watch.
As for the movement, the Valjoux, or the Universal Genève were commonly used by many other brands, as you know.
The interest of this 4 ATM is that it is a big Chrono, with a nice aesthetic, as well as the other similar chronos released by some other brands.
A matter of taste, indeed.
Thanks for your input, Ben.
Best,
Nicolas