Here we have a Naval Station Pointer (also known as a three-arm protractor) housed in a fitted wooden Case (45 x 19 x 4 cm) made by Cooke, Troughton & Simms.
WWI Brass Naval Station Pointer, Navigation Instrument
WW2 NAVIGATION STATION POINTER, US Navy, 3 ARM PROTRACTOR Warren-Knight Co, 1941
Station Pointer Marine Maritime Navigation Antique USSR Soviet Russian Protracto
