Drafting Supplies, Drawing Pen, With Box

This is a drafting tool called a drawing pen (烏口 - karasuguchi).
This one is made by KENT.

A drawing pen is a drafting tool used to draw uniform lines by holding ink between its nibs.
It has been used for architectural drawings, mechanical drawings, and design work.
Currently, it is popular not only for practical use but also for calligraphy and art creation.

[Condition]
This item has been stored at home.
- Comes with a box (the box has tears, dirt, and scratches).
- There is rust, small scratches, and scuffs due to age.
- The screw mechanism moves without issue.
Please check the photos for the condition.
[Size/Specifications]
- 713-0900 Bone pattern drawing pen
- Line width can be adjusted by opening the nibs.

Please consider this item understanding that it is used.