Original 1st printing 8&1/2 x 11" double-sided ticket-order form/flyer for the Summer 1973 season at the Universal Amphitheatre in Los Angeles, CA. 

 Designer unknown, acts listed include: Grateful Dead (6/30-7/2), John Denver (7/9-15), Roberta Flack and David Steinberg (7/16-22), Johnny Mathis with Henry Mancini (and Orchestra) (7/25-29), Tom Jones (7/30-8/4), Harry Belafonte (8/5-12), the Carpenters (8/13-19), War (8/20-26), 5th Dimension (9/5-9), Bette Midler (9/10-16) and Englebert Humperdinck (9/17-23); 

 Medium-thin glossy stock flyer is in excellent to near mint (A- to A-/B+) condition; other than a hint of light handling wear and a trio of horizontal folds (as issued, folded into 1/3rds for mailing), this one is just about as sharp as you can expect to find.

 VERY uncommon early-'70's Grateful Dead concert item, they definitely stood out among all the soft-pop and Las Vegas-style acts that filled out the rest of the season that year. Listen to the 6/30 show here;

https://archive.org/details/gd1973-06-30.sbd.sbvol9.chappell.29753.flac16