Boss Jock Johnny Mitchell Postcard

This is a promotional postcard for Johnny Mitchell. The back of the postcard reads:

KHJ “Boss Jock” Johnny Mitchell
The out-of-sight sound of Johnny Mitchell is the newest, bossest groove on Los Angeles radio dials. Johnny’s a swinger all the way who digs every single sound he’s laying into Southern California. He’s been a topper everywhere he’s travelled . . . and now, baby, this is where he is!