| Description | English: Labeled illustrations of the front and rear of a Corona No. 3 portable typewriter |
| Date | 1920 |
| Source | How to Use Corona, the Personal Writing Machine (https://archive.org/details/How_To_Use_Corona_Typewriter_1920/page/n5/mode/2up) |
| Author | Anonymous |
| Description | English: A woman types on a Corona folding typewriter |
| Date | 1920 |
| Source | How to Use Corona, the Personal Writing Machine (https://archive.org/details/How_To_Use_Corona_Typewriter_1920/page/n1/mode/2up) |
| Author | Anonymous |
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