Comment by WillAdams

Two articles on it (which probably were part of the source for this one):

- https://www.penaddict.com/blog/2016/1/17/bic-cristal-ballpoi...

- https://www.jetpens.com/blog/How-the-Ballpoint-Pen-Changed-t...

a book which has a bit on the usage of this and similar Bic models is:

https://www.paulshawletterdesign.com/2012/12/blue-pencil-no-...

(ob. discl., I received a copy (which I gave to my daughter) to write the review: http://ftp.tug.org/TUGboat/tb34-2/tb107reviews-zapfhallmark....) which has the line:

> Some such details are very humbling, such as the exquisitely beautiful design study for Zapfino-like capitals intended for use with Firenze shown with the 49 cent Deluxe Fine Point Bic ballpoint pen used to render the letters (pg. 43).