Challenge coin - Anchor. Show your Membership and Pride in NWCA through use of this unique Challenge Coin. This 1.75" sold brass coin, in full color, is loaded wit NWCA Patriotism and History: from our motto to our Compass Emblem to our Service Branch Shields o the Honor we give to four founder, Mary Paolozzi by recognizing the 1936 charter year of the NWCA.