This vintage Alvin No. 1112 Swiss Opisometer Drafting Tool Measuring Wheel + Box L1F is a must-have for collectors and enthusiasts of drafting tools. Made in Switzerland, this tool is a rare find and a great addition to any collection. The brand Alvin is known for producing high-quality drafting tools, and this opisometer is no exception.

With its unique design and precision measuring capabilities, this drafting tool is perfect for engineering and medical applications. The measuring wheel and box provide additional functionality and convenience. This item is categorized under Collectibles, Science & Medicine (1930-Now), and Engineering, making it a valuable addition to any collection.