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WIENER TUBA KAWAI KFBLmade by Musica . en WIENER TUBA KAWAI KFBL made by Musica Viennese sixvalve bass tuba in With its ingenious fingering and valve system the sixth valve turns an tuba into tuba the Viennese concert tuba is as it were combination of bass and contrabass tubawith no discrepancy in sound ja Picture taken