Collectors and dealers say some old $100 bills are quietly trading for many times their face value, turning an ordinary trip ...

Pull any bill out of your wallet. See the dark green numbers on the top-left and top-right corners? Those are serial numbers, and some are more rare than others. If you happen to have paper money with ...

Need to figure out your Apple Watch serial number? Follow along for how to find it even if you can’t read the serial number on the watch itself or power on the wearable. Apple has removed serial ...