Personalized Nautical 70th Birthday Youth T-Shirt. Funny 70th birthday Youth T-Shirt - Kelly Green with a big number 70 and anchors says VINTAGE VESSEL, THE ANCHOR STILL HOLDS. Perfect for ancient mariners! Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.