New England Patriots William Bill Sullivan Jr signed JSA coa

This signed letter from 1981 is the perfect item for any Patriots football fan. There is a tiny tear on the right side (see last picture). It was just certified on May 18, 2025 by JSA. This coa (certificate of authenticity) is by James Spence Authentication, which is rated one of the top three in the country. These are respected by all of the big auction houses.