The "World Time" complication is able to show the time for all 24 time zones on the same watch and was invented by Swiss watchmaker Louis Cottier in 1930s.
世界时这项复杂功能可以在一块手表上显示世界24个时区的时间，由瑞士制表师路易·柯蒂亚（Louis Cottier）在20世界30年代发明。