Jaeger-LeCoultre

BDLJ
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Interesting, but questions....

...shock is a very quick application of an acceleration. It's not just the magnitude of the 'g's, it's the duration and rate of loading that matter.

 The shock absorber here is air which will dissipate the shock energy as heat. The problem is that the damping effects of air is proportional to velocity of the inner case movement. So to be effective, it would have to be tuned for a certain range of velocities. This can be seen by the fact that if you slowly press the case, it compresses. So at low velocities, it has a lot of movement, at higher velocities, it will almost lock up - not much damping.

Or another way to look at it is: a really short sharp shock will not cause much movement and any movement will be very rapid. In these circumstances, I wonder how effective the damping system will be?

All this is rather esoteric but unless the data from JLC is available, this system makes me wonder. I am not saying it's ineffective, as it has to be better than a completely rigidly mounted watch (but then how tight do you strap your watch ). But I wonder whether the complication brings any practical benefit....

Then again, all is a moot when you have 2 massive crowns hanging off the case.