Believe it or not, watches at one point were like cell phones.
They were new, exciting, and like cellphones were a large part of the buisiness community. Only the rich could afford them, because only the rich really needed them. Now that watches are more commonplace among workers, and are sometimes outright replaced by smart phones, here's a few reasons you might want to wear your dad's old watch to an important interview.

Watches are status symbols

Whether or not you recognize it, mens watches represent an elevated status. Even with watches becoming much more common, they still represent the professional heirarchy that used to wear them, and make a powerful statement were you to strap one onto an already dashing getup.
They represent your care for quality

If you're going through the trouble of buying a watch in the first place, you're not going to blow twenty bucks on one just to call it a day. While high quality men's watches might have a somewhat daunting price tag attached to them:

There are multiple manufacturers that produce high quality, yet affordable and stylish watches for all types of consumers
Decent watches are typically a one time investment, while you might be paying a lot, you're only going to be paying once
A quality, or brand name watch that is easily recognizable is a conversation piece for any occasion, should it catch the eyes of a hobbyist or someone with no knowledge on watches at all
And most importantly, they show you care about quality. You're willing to go the extra mile to make sure you have a reliable, fashionable piece of technology, sparing no expense. Whether or not it's mentioned, this is information typically absorbed by employers.
Identifying a quality watch

So, you're sold. You want to get off this article and start looking for a watch, but there's only one problem; you don't know what to look for! That's okay, it's not too complicated to select your very own watch. First, you have to consider why you're buying a watch. Are you using it for an interview? Perhaps for a day job, or maybe to complement your "going out" outfit. Whatever the case may be, try to consider the following:
Does it go with the rest of your clothes?

Something you need to consider when buying a watch is whether or not it goes with your outfit or not. If you're going to be wearing it to work, and your uniform is dark, wearing a watch with a tan leather wrist strap might do more harm than good due to the contrast it has on your outfit. Think about what you're going to be wearing with it, and if the colors and design of the watch match.
Does it go with your budget?

Before dropping a ton of money on a watch, think about what you need it for. Is this going to be the centerpiece of your outfit, or just a compliment to it? How important is having an expensive watch to go with these clothes, or for that situation? Sometimes it's worth going the extra mile to splurge on a watch, when other times it might be more suitable to get a cheaper one.
And above all: Do you like it?

This one might not be obvious, but it's very important. Make sure when selecting a watch, regardless of it's quality or price, that you'll actually be happy with your purchase after you've made it. Don't wear it for them, wear it for you.
Watches are more than just wristbands for telling time, they're conversation pieces, and a statement about you that shows that you remember a time of professionalism and style, and continue to uphold the cultures and standards of the fashion and buisiness world alike.