3" Black Plain Leather Equipment Ring for Truckman's Belt by Boston Leather®. Boston Leather has been producing fine leather goods since 1938. In the early 1940's they began to focus their efforts on the law enforcement community. Their leather is produced in the United States, tanned in the United States, and Boston Leather's products are manufactured in the United States! With over 60 years of experience Boston leather is a name you can count on for professional equipment and accessories that can stand the test of time.