The MiG-21 came in many variants. One of the less known variants is the MiG-21S (for Saphir), which received this designation because it was fitted with a Sapfir-21 radar. The MiG-21S had an R11F2S-300 powerplant and could carry the GP-9 cannon pod. It had four underwing hardpoints. It served only with the Soviet Union and was never exported. It was produced from 1965 to 1968 and this example arrived in Monino in June 1971.

The air base of Byaroza (Osovets) in today's Belarus was home of the 927 istrebitelnyy aviatsionnyy polk (927 iap) which deployed from here to Afghanistan in 1983-1984 with the MiG-21. The regiment and its MiG-29s were transferred to Belarusian control when the Soviet-Union broke-up in 1992. In town, this MiG-21S is preserved to commemorate the unit's deployment to Afghanistan. Ex bort 46 red.

Previously coded 92 red.

MiG-21S all-weather fighter preserved at the excellent Monino museum near Moscow.