The Vintage Lilly & Gillie Captain Fields Parallel Ruler is a unique navigational tool used in engineering and drafting. This tool, dating back to the early 20th century, allows users to plot precise parallel lines with ease. Its design incorporates the classic Captain Fields ruler, making it a valuable collectible for science and medicine enthusiasts. With its historical significance and practical functionality, this ruler is a must-have for anyone interested in drafting and engineering tools from the past.

Estate sale item from a Scottish Captain of Ships in the Middle East