I am having a time with this mechanical pencil. It is square, has a pocket clip and is numbered (like a ruler) on one side. Marked:
Germany
U.S. Zone
Besides not being able to locate one like it, the numbering on it has me puzzled. The ruler is in inches and the last number to the right is 12. To the left it goes down to the 8 inch mark but no number 8. It is calibrated in one eights of an inch and the numbers 9, 10 and 11 are there. I had thought perhaps there was an outer sleeve with the rest of the ruler that would connect, however the round end toward the tip is larger than the square so connecting a sleeve or extension won't work. The eraser end has a screw on cap.
I wonder what it may have been used for, who made it, does it have a special name? etc. I would say the main body is stainless steel although it isn't marked.