In 1920, Western Union has implemented the world's first transmission of images over the ocean. In the early forties of the 20th century, Western Union has used the first time a commercial intercity microwave transmission system. The first offices of company were located in the Reynolds Arcade building in Rochester, New York. The sign above the main entrance to the building - In the 30's of the twentieth century, Western Union has become the world's largest telegraph company. On the market was placed about 765 million of ordinary shares of the company. On the first day trading on the exchange the company's shares rose by 3.3% and the cost was $ 19.96. In 1933, by the Western Union Company were invented "singing telegrams".