Jim Harbaugh played college football at Michigan and played in the NFL for 14 seasons, from 1987 to 2000. He then served as the head coach of the San Diego Toreros (2004–2006), the Stanford Cardinals (2007–2010), and the NFL's San Francisco 49ers (2011–2014). In 2015, Harbaugh returned to his alma mater, Michigan, as head coach.
This Baltimore Ravens mini helmet was signed in gold by Harbaugh and includes a Great Moments COA. There is a slight smudge at the end of "Harbaugh" as seen in the photo.