thecarpathian,
I may be wrong but I remember Alfa Romeo Spiders having just that written on them (except the number for displacement, or Veloce on some iterations, maybe Graduate in the U.S.A. to capitalize on the movie, etc.). I think Alfa Romeo model was actually called Spider while some other brands had "model+ spider" (124 Spider, for example). Sort of, Alfa Romeo Spider pinpointing to just one model.
I just remembered how we ended up with this topic. It was because of the Queen song. Ok, not too far from audio.