Thoroughbred does not mean unrestored; most are restored but to exactly how it came from the factory with no aftermarket parts, and all parts having stamped dates as though it came from the factory (e.g. dates just before build date). This is probably the most demanding of categories, with unrestored close behind. Unrestored allows some patina and service parts from Ford (e.g. oil filter) from routine maintenance.
Grill Medallions are given to cars in various categories that have accumulated enough points via National Shows. Conservator cars are those with Medallions that have reached their judging limits and are shown as being "Conserved" with minimal judging.
There are Concours Driven and Concours Trailered cars that are restored to new-like condition, but contain reproduction parts and/or non-enamel paints.