Zenit 3M is a 35mm film SLR made by KMZ and produced between 1962-70 with the quantity of 781.678 units. Zenit means Zenith, a point in the sky that appears directly above the observer.
It is a part of the long-running Zenit series. The UK export version of this camera doesn’t have the 3M marking on it only marked Zenit on the front.
This camera does not come with any lens as it seems it does not support the typical M42 mount like most Zenit’s