UB5ARTEK 1964 Ukraine

Gagarin and Titov in Pioneers Camp ARTEK in Crimea.
UB5KAS (1962-1964), UB5ARTEK (1964-1966), U5ARTEK (1967-1988), U5A (1986-1988) and again U5ARTEK (1988 - mid 2000s).

QSL Front, Info G4UZN Collection
QSL Reverse UY5XE Collection
Callsign info courtesy of UY5XE