The Zenit-E was produced from 1965 to 1982. One of the most popular 35mm cameras ever. Over 3 million made. It was a redesign of the previous Zenit 3M, Kristall and Zorki 6. Hinged back with a more "modern" look. Additionally it had a built in light meter. It was available in both the M39 and M42 lens mounts. One can easily see the ancestry in the later Zenits. A reduced cost version, the Zenit-B was available from 1968 to 1973 with a special run in 1977 and 1978. It did not have the light meter.
This example is a Zenit-B with Industar 50 lens. It was made in 1969. Seems to be in good condition. I have not used the camera but have taken pics with the lens mounted on my Pentax DSLR via a screw mount to kmount adapter.