The Nikkormat EL was the first ELectronic Nikon model. At the time Nikon considered the Nikon F-series to be their high-end product and lower priced models carried designations like Nikkorex or in this case, Nikkormat.
The Nikkormat EL offers precise match-needle manual metering and aperture priority automatic exposure in a tough, all metal package. This camera pre-dated AI-series lenses and requires lenses that have the meter-coupling prong .
Aperture-priority auto exposure control
Precise match-needle manual exposure metering