I believe sealmark is referring to the 1990 British Petroleum set, issued as part of a contest. Guessing they didn't have the licensing to use the NFL team logos, so all cards show headshots with no helmets. Looks like about 15 of the 40 were HOFers.
https://www.ebay.com/itm/1990-Britis...AAAOSw99tcKQr8