Acting · b. 1944 · Norrköping, Östergötlands län, Sweden Michael B. Tretow Acting ABBA Silver, ABBA Gold Himself - sound engineer 2023 ABBA: The History Self 2003 Magasinet Special: Chess 1984 Self 1984 Other Credits Young Jönsson Gang: The Cornflakes Robbery Original Music Composer 1996 Bert: The Last Virgin Original Music Composer 1995 Charlie Strap and Froggy Ball Flying High Musician 1991 Det första äventyret Music 1988 ABBA-dabba-doo Sound 1976 Agent-readable