It took some time to get my hands on a Pentel PSD5 Pencil and here it is. This one was used and was missing a cap over the eraser and it does not work without the cap. I contact Ginger Goode who is the Consumer Quality Assurance Manager at Pentel of America and she found me the part. What a great pencil and a big thanks to Ginger. The pencil is listed in my 1985 Pentel Catalog so the pencil has been around at least that long.
Here we have both of my favorite vanishing point pencils. Top one is the Pilot H-2005 and on the bottom is the Pentel PSD5. I don't know who was first but there have been plenty of variations of this Pilot and there has only been one Pentel. Both are great pencils and highly collectible. Add them both to your collection.