When Did Toni Blankenheim Die?

Toni Blankenheim was a German operatic baritone. He notably sang major roles in the operas of Alban Berg: the title role of Wozzeck, produced for television in 1970, and the role of Schigolch in the 1981 recording of Lulu which won a Grammy Award for Best Opera Recording. He is also on record singing the role of Alberich at Bayreuth. His memorable Beckmesser in Wagner's Die Meistersinger von Nürnberg with the Hamburg State Opera has been preserved and is available on DVD.