Corona Model Four
The Corona Four had 42 full-size keys, a 10-inch carriage, and a 2-color ribbon. The typewriter was a huge success, and the company only stopped producing it when its factories were requisitioned for the war effort in the 1940s.
This model was built in Syracuse, New York, in 1930.
Cards are 4.25 x 6 inches in size, printed on 14-pt card stock with a high-gloss exterior and a blank, uncoated interior (translation: they are shiny on the outside, but you can use virtually any writing implement on the inside without worrying about smudging).