This very simple analog World clock by SelkeyMoonbeam, displays in a clever way the time of 24 different time zones. All you have to do is turn your city to the clock’s base, adjust the right time, and then just turn the city that you are interested on to the base. The clock now will show the time at that city.
“It’s not really that useful if you’re a world traveler, you have to take the minute hand off or it’s wrong every time you turn it. But the hours are right, so it’s good for if you’re doing international business, or have friends overseas that you want to contact. Actually, I was considering making a version that left off the cities and simply displayed the names of my wide-spread family members so that we’d have an easier time discussing when to Skype call.”