The FX-3 is a 35mm single lens reflex, released by Yashica in 1979. It has a focal plane shutter up to 1/1000, an exposure meter with centrally ponderate measure and LED reading in the viewfinder, and it can take all the Yashica / Contax lenses. It was only sold in black.
In 1984 it was replaced by the FX-3 Super, that added a new steady grip, dedicated flash units (not TTL) with a flash LED in the finder, and moved the meter switch to the shutter release button. It was only sold in black finish, but Yashica released the FX-7 Super in 1985, exactly the same camera in chrome finish.
In 1986 they were substituted by the FX-3 Super 2000 with a shutter speed range extended to 1/2000, and a sensibility range from 25 to 3200 ISO instead of 12 to 1600.
The rumor says that the quality of construction of the later models was lesser than the earlier ones.