The band started their career by playing instrumentals inspired by the music of The Tornados, Johnny and the Hurricanes, The Champs, The Coasters, The Drifters, Santo & Johnny, and soon achieved notable popularity.
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During January and February 1966 they performed at Belgrade Gitarijada (not to be confused with Zaječar Gitarijada) where they won the fifth place.
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Iskre were one of the first Yugoslav bands that appeared on recordings by pop music singers: they recorded with Zafir Hadžimanov (covers of Cliff Richard songs), Ivanka Pavlović, Zoran Rambosek, and others.