A few of the shapes had agreed-upon names, like the Falcon and the Albata, but there weren't many. As I mention in the article, I had to either make up a name, or use a name associated with a pen of that shape that is most widely known, like the special shape of the Esterbrook Inflexible. The shape is fairly common, but I've yet to see a name given to it, so I just used the biggest selling example (at least in the US, and I don't see any Brits making a glossary
), the Esterbrook Inflexible.
I made this glossary out of personal need. I want to be able to classify the shapes of the pens in the inventory of my own collection. Some shapes could easily be broken down into sup-categories (the Shield pen is a good example, some are squat shields and some are longer shields that approach a spear shape), and some are variations of a central design, like Spoon pens and the Pinched Spoon. And I've lumped all four styles of Oblique pen into one category with four sub-categories because there are really four shapes, but it's useful to know that all are forms of oblique.
All that to say I know it's not completely consistent, but right now it's useful to me. More useful than just using Roman Numerals.