[WWI]. [ARMSTRONG, Rolf (1889-1960), artist]. “Your Country Needs You- Join the Navy!” New York: The Knapp Co., Inc., 1916. Lithographed World War I recruitment poster with a color illustration of a saluting sailor (“First, Last and Always”) by Armstrong, on thick paper. Approximately 490 x 368 mm. Toned, horizontal and vertical creases, marginal chips and tears, one central small hole, pin-holes at corners, some soiling.