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The Dutch Model H was a mask produced for the Navy, and the Marines, which are considered a part of the Navy in the Netherlands. It was the only Dutch Navy mask ever made, and it was never used by the army. It came into service in 1938, after the Model G was considered insufficient. It was produced in limited numbers, until the German invasion in 1940. It has a screwed on filter, unlike earlier masks with a fixed hose. It also had an adjustable chin rest, and a 5 point head harness with a fabric piece at the back. The mask came in a canister that was shorter than usual. The kit included a filter, spare parts and spectacle ointment.