Nikon's first shutter-priority AE (Auto exposure) Single Lens Reflex (SLR) camera
First, may I ask you a question ?
"Which Nikon's SLR camera was the first to feature the shutter-priority AE function ?"
You may have eliminated the Nikomat EL (Nikkormat EL) as a possible answer because although it is Nikon's first AE camera, it is an aperture-priority AE camera. Thus you might have chosen the "Nikon FA" (Photo) as the first AE camera within shutter-priority.
If so, you are mistaken.
People always misunderstand. Nikon's first AE camera with shutter-priority already existed almost 20 years before the Nikon FA released in 1983 and awarded "1st Camera Grand Prix". It is the "Nikon AUTO 35" mentioned here.
At times, this common misperception has been fostered by the media. For example,
an "Asahi Camera" magazine series featured a "New Face Diagnosis" article on the Nikon FA in the December 1983 issue stating that "FA (syncopation) was Nikon's first camera also equipped with shutter-priority AE mode [S]". After all, the Nikon AUTO 35 might have been forgotten.