Hurst or Douglas Style Square Protractor:
British made by Charles Smith Reddish of London. The Douglas square protractor
or sometimes known as a Hurst square protractor comes in three sizes 5" 8" 10" Constructed of durable, transparent plastic.
This square Protractor ideal for rapid plotting of courses and bearings in a small bridge, cockpit or confined space. Notations can be easily made directly on matte plastic surface with pencil. Can also be used as a simple parallel rule and plotter.
. £7.29 each