Skipping from London to NYC means a good ol’ change of the watch time. Sure you can sport a digital watch that supports multiple time zones, but personally I wouldn’t get caught dead with one of those on, unless it was in some sort of trendy binary format. To avoid geekdom and burnt out finger tips, just nab a Rotary Round Revelation by the Swiss watch maker and flip between the 2 faces to get an alternate time zone. Cost you $530, but apparently not available online.
More info here.