On May 31, Brooklyn Bowl will host a special live auction for Jerry Garcia’s famed “Wolf” guitar, which will be auctioned off to benefit the Southern Poverty Law Center.

The legendary guitar was given to Guernsey’s by its current owner, who purchased it from the auction house in 2002 for close to $1 million but now wants to use it to help the SPLC. The event page notes that “celebrated musicians” will be playing Wolf at the live auction before the guitar changes owners, but no specific lineup is listed.

The Doug Irwin-designed guitar made its debut in the Jerry Garcia repertoire on September 5, 1973 and most famously appears on the cover of Garcia’s 1974 record Compliments.

The Southern Poverty Law Center, formed in 1971 and designed to ward off the remains of the Jim Crow segregation, currently aims to eliminate and combat hate groups, preaching diversity and tolerance to a wide variety of groups.

All proceeds from the guitar’s sale will go towards the organization.