When I saw Fuji listed above I had to do some digging, I have some original order sheets for Fuji bikes from that era, the Professional doesn't show up until right before Christmas 1975 for the 1976 model year. It does list the Cyclone as a rear derailleur.
I also found a site will all the Fuji catalogs listed: http://classicfuji.com/0_Cat_Cvr_Home.htm