This is the rare white Masters flag that was sold in very small quantities at the 1993 Masters Tournament. This flag was sold a few years before flag collecting became popular, and a full five years before the now-popular thick yellow Masters flags were ever produced. 

This official white Masters flag is highly impressive, as it is autographed by 34 different Masters Tournament Champions. Most importantly, it is autographed by Tiger Woods, as well as seven (!) deceased Masters Tournament Champions - including Byron Nelson, Gene Sarazen, and Sam Snead. Here is a complete list of the autographs on this remarkable flag:

Tiger Woods
Byron Nelson (deceased)
Sam Snead (deceased)
Gene Sarazen (deceased)
Art Wall (deceased)
George Archer (deceased)
Gay Brewer (deceased)
Billy Casper (deceased)
Jack Nicklaus
Jordan Spieth
Phil Mickelson
Bernhard Langer
Jose Maria Olazabal
Mark O'Meara
Mike Weir
Nick Faldo
Angel Cabrera
Tom Watson
Craig Stadler
Vijay Singh
Adam Scott
Charl Schwartzel
Ray Floyd
Bubba Watson
Ben Crenshaw
Zach Johnson
Fred Couples
Charles Coody
Ian Woosnam
Gary Player
Larry Mize
Tommy Aaron
Sandy Lyle
Trevor Immelman
Nick Price (non-champ, Masters Tournament low score record holder)

Certificate of Authenticity from Green Jacket Auctions (GJA)