Check the listing for details. Vtg Protractor School Math Drafting Compass Instrument Clamp Pencil Style. Condition: New, Made in Unknown. Listed at 2.99 USD. This vintage drafting compass instrument clamp pencil style is a must-have for any collector of drafting tools. It is a protractor school math instrument that is perfect for those who love to study and measure angles. The design of this compass is reminiscent of the ones used in the 1930s, making it a great addition to any collection. The clamp pencil style of this vintage drafting compass makes it easy to use and carry. It is an ideal tool for students and professionals alike who need to measure angles quickly and accurately. This drafting compass is a great collector's item that will add value to any collection. This is new, still has price tag on it, 19 cents. Vintage. In great working condition. Smoke and pet free.