Vintage Ebony & Brass Parallel Rule
Original vintage s ebony and brass Parallel Rule.Parallel rulers are used to plot direction on your nautical chart. They are, essentially, two straight-edges hinged so that they maintain the same angle. By alternating the moving edge, and securely holding down the non-moving edge, you can move the rulers about the chart while still maintaining the same angle. This rule is unique as it has no distinguishing markings or makers name and in mint condition considering how old it will be! £45 ovno Ad ID: Delivery Services Consumer Credit