http://www.all-for-tennis.com/135248/vintage-case-of/penn-medalist-tennis-36-balls-vintage-case-of-12-cans-3-ea-can-nos-sealed-rare.html YEARLY 2016-09-11 1 http://www.all-for-tennis.com/129519/vintage-case-of/vintage-case-of-12-cans-3-dozen-36-penn-medalist-tennis-balls-nos-sealed-rare.html YEARLY 2016-08-25 1