In 1920, Western Union has implemented the world's first transmission of images over the ocean. Another invention of Western Union - time synchronization. Most service points of Western Union work in the time convenient for customers throughout the week and throughout the year. In 1877, starting from September, New York City residents began to have the opportunity to check the time on clock with the "time ball", located on the roof of constructed in the same year a new corporate headquarters - Western Union Building. In the early 60s Western Union has put into operation transcontinental microwave system of data transmission via radio waves, completely replacing the web of telegraph poles and wires. In October 2006 the company made an initial public offering of shares on the New York Stock Exchange, becoming independent from First Data company. In October 1871 the company Western Union began to provide money transfer services, drawing on its own extensive telegraph network.