Here is a Wearever Trans-Vue Mechanical Pencil from the 60s. This pencil was modeled after the Scripto K780 Pencil and Wearever did a good job of it. I only have four of these but they all work well. The pencil on the bottom is a Scripto K780 so you can compare. They both use the same 1.1mm lead and the same eraser. The Wearever is clearer and you can almost see through the pencil. It also has a removable pocket clip which the Scripto does not. Wearever has made many good pencils over the years but this is a must have for Scripto and Wearever collectors.