Golf balls used by veteran professional golfers in tournaments, 12 in total. These were received directly from the players while assisting at a golf tournament. As they are old, the thread-wound balls of the time show discoloration and deformation. The two-piece balls have less change over time and are white. Toru Nakamura Kikuo Arai Seiichi Kanai Tsuyoshi Yoneyama Yutaka Hagawa Toshio Sha Akira Yabe Tetsuo Sakata Nobumitsu Yuhara Sakusaku Maeda Yoshitaka Yamamoto Kazuo Yoshikawa