What do you need a watch for, there are more than enough clocks all over the place in a modern cockpit, and in case of emergency ask the copilot, they usually wear watches the size of a frisbee.
You clearly don't fly a military helicopter (or a British one anyway). When seconds count what you really want is one small, poorly positioned, massively inaccurate and impossibly difficult to read analogue clock! Ok, so that's the last thing you want but that's all you get! Gives you an excuse when you time on target is a bit off though.
The military watch of choice (certainly on ops anyway) is the venerable Casio F91W, now available in an array of unattractive colours. I do also own a Breitling penis extension which (contrary to a previous post on here) has actually been a great investment as it has double in price over the past 7 years! Oh, and for all those that say they are rubbish and inaccurate, it hasn't lost a second in the last 5 months!