Travel watches should be, first and foremost, easy to use. The Concord C1 Worldtimer (www.concord.ch), priced from $16,900 to $22,900, delivers on this functional front without sacrificing form. Created with the help of the Geneva-based company Blade Design, the 47-mm-wide watch features modern lines and a multilevel dial. The dial’s scale and open space make it easy to read the destination display, which can be manipulated by pressing a button situated at two o’clock. Once the wearer of the timepiece selects a city, the hour of the corresponding time zone appears in a window adjacent to the city name.