FT (Frequent Traveler) members were allowed in there as well. The cabin had no movie screen on many (all?) 747, and it was really nice to cross the Pacific in a dark, silent cabin with just 4-5 fellow passengers.
Originally Posted by FTraveler
It's also my understanding that in the 70s, Pan Am introduced the first three-class configuration: First, Clipper and Economy and designated "C" for Clipper Class. Clipper Class was located directly behind F. Seats were exactly the same as economy, with the only difference being an enhanced meal service including a special appetizer and wine split, and free movie headsets. IIRC it was reserved for full fare Ys.