Art Donovan anchored the Colt's storied defensive line of the 1950's for nine years. Number 70 was the first Baltimore Colt elected to the Hall of Fame and has remained a beloved figure in Charm City since he retired. Art signed this Riddell Throwback Baltimore Colts mini helmet in permanent blue sharpie and added the inscription "HOF 68" The signature was witnessed by Schulte Sports and comes with their tamper-proof hologram.