“Mastodon – Los Angeles, CA 2017” by Robert Bowen Posted on April 23, 2017 by admin Robert Bowen now has “Mastodon – Los Angeles, CA 2017” gig posters available. On sale now HERE. “Mastodon – Los Angeles, CA 2017″ by Robert Bowen. 18″ x 24” 4-color Screenprint. Artist edition of 40 S/N. $40