Four CD set. The Mothers 1970 is a collection commemorating the 50th anniversary of the 1970 Mothers with 70 unreleased tracks. Personnel includes Mark Volman & Howard Kaylan (Flo & Eddie), George Duke, Ian Underwood, Jeff Simmons and Aynsley Dunbar. Featuring unheard studio sessions from Trident Studios in London England with engineer Roy Thomas Baker, and historical live performances mostly captured by Zappa's own tape recorder. Clam Shell Box with 4 discs, booklet and a button.