The Olympus 35ED is a fully automatic 35mm rangefinder camera which is also the last member of the Olympus 35 series EE (electronic-eye, which simply means automatic exposure) cameras. After Olympus introduced the flagship 35SP (the first and only spot-meter equipped compact rangefinder in the world), it released a series of stripped-down models over the years until the introduction of the 35ED in 1974. In other words, the 35ED is a close relative (sharing similar bodies) of the shutter priority/manual exposure 35RC loved by many collectors and also a distant relative of battery-less Trip 35 (also EE/fully automatic but no rangefinder and a different body).
The offered copy has a minimal defect, the lamp informing about underexposure does not work.