This antique 6" ebony and brass parallel ruler is a true gem for marine and architectural enthusiasts alike. Crafted in the United Kingdom during the 1800s to 1900s, it is a rare piece of engineering/surveying collectable that is perfect for any collection. Its miniature size makes it a unique addition to your display and is perfect for those who appreciate the intricate details of these tools. Made of high-quality wood and brass materials, this parallel ruler is both durable and elegant.