Here is a preview of a new article for the next version of the Pentel Pencil ID Book, on “Missing” Pencils. These are ones I have seen something about, an ad or a patent, and in one case the pencil is just inferred.
Here is a better version. The picture on page 1 is cleaned up and I have small pictures of the pencils mentioned on the SG5 page. _Appendix B - Missing Pencils.pdf (697.3 KB)