WWII era Prismatic Marching Compass by ‘N.V. OBSERVATOR ROTTERDAM’. MISC 878. WWII era Prismatic Marching Compass by ‘N.V. OBSERVATOR ROTTERDAM’. MISC 878.

Marked to the rear ‘N.V. OBSERVATOR ROTTERDAM’ 2028 D’ which is also on the inside of the cover. Made from brass and over lacquered in black. The compass is intact, and still contains the original fluid damped disc, the inside is clear and the numbers, (Divisions: 360 deg., clockwise), on the mother of pearl compass card dial are easy to read. In 1924 a few men began supplying instrumentation (manometers, compasses and dial thermometers) to the marine industry. Their business, known as ‘De Nieuwe Rotterdamsche Instrumentenfabriek Observator N.V.’, was located in a small office near the harbour in Rotterdam, the Netherlands. There are compass points engraved on the outside dial with a turning dial held in place by a brass screw. The price includes UK delivery. MISC 878.