This is my Take, although this question sounds funny to me,
The history tell us Parker is Famous for 120 years,
https://www.youtube.com/watch?v=JNCaq_ici78
And then the Sheaffer History says it is famous for it's timeless Iconic brand. ( This video talks better when viewing this )
https://www.youtube.com/watch?v=o75FbV71mw4.
Not looking at any revenue they generated, but the foot-prints they left in innovation of creating tools to write in many more levels they were both famous.
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