@cobalt123 Probably on the order of 20 years. Until recently it hung in the bathroom, because that's a place where one often has a time constraint (get to work, a meeting, etc.), isn't wearing a wristwatch, doesn't want to use a phone, and is not wearing glasses.
It has been replaced by a small back-lit digital clock that illuminates on noise, so a clap of the hands tells time. Personally, my watch claims it's waterproof, so I test that and wear it into the shower. ;)
@cobalt123 Ha. My rule would be "You have 25 minutes, after that, I'm popping the door lock and letting someone else in!"
I love deadlines. ;)