A Boston Celtics Limited Partnership stock certificate that has been signed by several important figures from the team's history. The 8x12" document has been signed, mostly in black marker by 23 including: Larry Bird, Bill Russell, Bob Cousy, John Havlicek (in blue pen), Bill Sharman, Tommy Heinsohn, K.C. Jones, Satch Sanders, Red Auerbach, Jojo White, Dave Cowens, Kevin McHale, Dennis Johnson, Robert Parish, Frank Ramsey, and Ed Macualey. The certificate has been authenticated by PSA/DNA. This is a rare opportunity to obtain an important piece of Celtics memorabilia.