The Antique Parallel Navigation Ruler is a 12-inch (310mm) tool made from a combination of brass and ebony, reflecting the craftsmanship and materials of the United Kingdom. This original piece serves as both a functional ruler and a decorative item, embodying the traditional aesthetic of maritime antiques. With its unique design and historical charm, this navigation ruler would make a valuable addition to any collection or workspace, offering both practicality and a touch of nostalgia for those who appreciate antique maritime artifacts.