Jackson Pollock 1948 "Square Pouring," promised gift of Helen and Charles Schwab

In a windfall for the San Francisco Museum of Modern Art, a group of nine collectors, including investment mogul and board chairman Charles Schwab and wife Helen, have joined up and promised the museum 195 postwar and contemporary artworks.

This gift enriches the collection on the heels of a 2009 gift by Gap Inc. founder Don Fisher of 1,100 works. A major museum expansion, by the Norwegian firm Snohetta, is slated for completion in 2016 (more on that here).

The Bay Area group seem to have taken a page from the playbook of a trifecta of who pledged a gift 800 works to the Dallas Museum of Art in 2005. (Those donors included Howard and Cindy Rachofsky, Deedie and Rusty Rose and Robert and Marguerite Hoffman).

Museum patrons Helen Schwab and Robin Wright chaired the gift committee. Other donors include trustees Carla Emil, Bob Fisher, Mimi Haas, David Mahoney, Norman Stone and Pat Wilson.

The Schwabs promised some of the biggest trophies including a pair of Jackson Pollocks: the 1948 dripped tour de force Square Pouring and 1951 Black and White (Number 6). Other Schwab pledges include Francis Bacon’s 1963 Figure with Two Owls and David Smith’s 1962 Voltri XII.

Norah and Norman Stone’s gift includes Jeff Koon’s 1985 Two-Ball Total Equilibrium Tank (Spalding Dr. J. Silver Series, Wilson Aggressor), donated in memory of late curator John Caldwell.

David Smith 1962 "Voltri XII," promised gift of Helen and Charles Schwab

Christopher Wool 2007 "Untitled," promised gift of Chara Schreyer

Francis Bacon, "Figure with Two Owls, Study for Velazquez," 1963, promised gift of Helen and Charles Schwab

Joseph Beuys 1962-1963 "Untitled (Vitrine with Four Objects/Plateau Central," fractional and promised gift of Norah and Norman Stone

Yves Klein 1957 "Blue Sponge Relief (RE 29)," promised gift of Helen and Charles Schwab