The Ford Thunderbird model that had portholes in the roof is commonly known as the "Ford Thunderbird (10th generation) or Tenth-Generation Thunderbird." This generation of Thunderbird was produced for the model years 2002 to 2005. The portholes, also referred to as "port-hole windows" or "porthole hardtops," were a distinctive design feature inspired by the classic Thunderbirds of the 1950s. These small circular windows were integrated into the sides of the removable hardtop roof, adding a nostalgic touch to the car's overall appearance.