This spectacular mint error is #36 in the 2010 edition of 100 Greatest U.S. Error Coins. It is described as "the most dramatic multi-struck Liberty Walking Half Dollar known."
After a first normal strike, this coin failed to eject properly and was struck again 55% off-center. The San Francisco Mint Mark is visible from the first strike. This is an absolutely stunning major mint error and is worthy of any coin collection.