This vintage drafting tool from The C-THRU Ruler Co. USA is a rare find for any collector or enthusiast of science and engineering. Its adjustable parallel 18" line bar allows for precise measurements and drafting, making it a valuable addition to any creative workspace. Made in the United States and manufactured from 1930 this piece of engineering history is a true testament to the craftsmanship of its time period. Perfect for those who appreciate the beauty and functionality of vintage drafting tools.

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