1975 Pittsburgh Steelers Championship Ring

For the Steelers' second straight world championship, which they won by beating Dallas 21-17, Rooney worked with Balfour designer Norman Shorrock to create what is perhaps the most unusual of all the Super Bowl rings that have been manufactured to date.

It is 14k yellow gold and features a compelx cushion antique shape with dramatically raised wording. Two 50-point diamonds were set in paladium, a precious alloy of the platinum family. The paladium was sculpted to display the Vince Lombardi trophy on the face. The trophy is flanked on both sides by the diamonds. The shanks are incised in the same manner as the previous year.

The ring weighs 23 pennyweight and was designed by L.G. Balfour. On one side is the official seal from America's becentennial celebration.