The Smena (Смена) is a 35mm film camera made in the Soviet Union by GOMZ between 1953 and 1962.
It was the first of a Smena camera series which later led to the famous Smena 8M.
The Smena camera was designed to be cheap and easy to use but could produce fairly descent image results for its quality. It is fully manual and the shutter speed ranges from 10, 25, 50, 100, 200 of a second. There is also a bulb ("B") function for long exposures, which can be useful, especially when combined with a cable release.
The lens is a GOMZ T-22 (Triplet) 40mm f/4.5
Apart from long exposures, it supports multiple exposures, since the film advance is completely manual.
This first model of Smena does not support film rewind, but has a cassette to cassette film transport. This means that you'll need to have a spare empty 35mm film cassette to which you will attach the film's tip. When the film ends it will be rolled into the new cassette out of its original one. If you don't have an empty cassette, you can use a spool, but once you take all the photos, you will have to roll manually the film back, in
total darkness, or put it inside a light-tight film canister.