5 Leva Communication Systems

Issued to mark World Telecommunications Day, this piece belongs to a broader Bulgarian commemorative program that ran through the late 1970s and early 1980s, producing .500 fine silver issues tied to UN and ITU observances. Bulgaria was among the more prolific Warsaw Pact nations in issuing such coins — partly as a hard-currency earner through export to Western collectors, a revenue stream the Bulgarian National Bank managed with deliberate commercial intent.