World Chess Championships Riga Interzonals 1979 –USSR Chess Covers

The 1979 Interzonals were held in Riga in 1979. It was won by Mikhail Tal of USSR. A Pre stamped Chess Cover was released by USSR on 03 Aug 1979.

USSR CHESS 4
INTERZONALS WORLD CHESS CHAMPIONSHIPS RIGA 1979 – USSR CHESS COVERS.