Typewriter advertisements changed significantly throughout the 20th century. A clear difference between the ads of the 1920s and the 1960s is the amount of color used in these ads. Way more play is used in representing these machines. Less formalities were mixed in creating a interest into the public using a commercially based advertisement for these machines. In the early days of the 20th century, the marketing had strict rules. These faded away significantly after WW2 as can be seen in the following ads.
Late 19th century (1880 - 1900)