In the decades between, Cross put aside its fountain-pen line to become a leader in rollerball, soft-tip, and ballpoint pens. In particular, its ballpoint pens and mechanical pencils were highly acclaimed. Since 1946, neither design has changed. Collectors today look for the size of the black ring at the top of the pen—pens with smaller rings are generally considered more valuable.
The fountain pens are much more valuable. I bet there is not much value there being there is so many of them.