Jaeger-LeCoultre

Is it ok to leave the compressor key open for chrono pusher all time? It's a bit pain to open it and close it all time... I saw the JLCs video where Patrick Musimu wear the diving chrono while he dive. Looks like he left the compressor key open on both ch... 

is that the chrono pusher locks are not rubber seals and do not add to the water resistance ability of the watch. like the more traditional screws on pushers, they simply prevent the chrono pushers to be pressed down accidentally. i think the water resist... 

I'll leave them open then. I use the chrono function all time

Hi, I've never played with a Compressor chronograph myself but if there are lockers that's for a reason. Pushers are generally not much waterproof on chronographs, specially when you push them. So if you lock the pushers there's less risk of water in (and... 

seen the ad movie for the MCDC from JLC with the diver diving into the sea.I just saw that and noticed that the diver has both chrono pusher key in open position when he dives. So I wondering if he can do that, then the chrono pushers be water tight even ... 

Hi, The pushers are supposedly watertight even if not locked. The compressor key improves the watertightness but also avoid the pusher to be used, what would be dangerous underwater. So you can dive with the pusher unlocked, but if you push it it's no goo... 

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