Original 1st printing 8&1/2 x 11" concert flyer for the Sons of Champlin appearing with Buffum Tool Co. at the Matrix in San Francisco, CA from 8/8-10/1967. 
 
 Art by Timothy (Dixon), thin flat stock flyer is in mint/near mint to near mint (A/A- to A-) condition; a SPARKLING clean example of this wild-looking little early-'67 Matrix flyer.