 The only two differences are that the logo on the original helmet read 'Steel', whereas Steelers appears on the helmet that the team wore for the two games in 2007 and that the face mask on this version of the helmet is black, whereas the original face mask color on the gold helmet was gray.The throwbacks, minus the "75th season" patch, are now officially the team's alternate uniform as of the 2008 season, and are usually worn for games that honor the team's alumni.Since their introduction in 2007, the Steelers have worn the throwbacks the NFL maximum of twice per year, with the team's annual home matchup against the rival Baltimore Ravens receiving one of the allotments each year.