Something like: Sprint, World, Worldsport, Le Tour, Prelude, Tempo, Circuit, Aluminum, Prologue, Paramount...more or less depending on the years.

Check the headtube for the model year. There are 4 really small little numbers on there. The first three correspond to the day of the year....not the month and day but the actual day. The 217th day not February 17th. The last is the year. No indexing? Sounds like pre-'87.