Every single Grateful Dead concert, 2,300+ live shows over 30 years, has an archived recording except one — March 17th, 1970 at Kleinhans Music Hall in Buffalo, NY. There is a reward for its discovery.

This is an embroidered Bluebird Records hat. Established in 1932, Bluebird Records was notable for recording Chicago Blues musicians. Notable blues musicians made up Bluebird's house band, which backed many records, including Big Bill Broonzy, Roosevelt Sykes, Washboard Sam, and Sonny Boy Williamson. Bluebird eventually folded after World War II, leaving a legacy of capturing extraordinary music from the 1930s and 1940s.