As we look ahead to our Legends in Advertising Awards (early bird deadline next week!) we’re looking back at the best advertising designs from the past three years of Print’s Regional Design Annual. Billboard for Levi Strauss & Co. using working cogwheels. Design Firm: Sagmeister Inc. Art Director: Stefan Sagmeister. Designer: Jessica Walsh Hail to the Cheese Signage. RBMM/The Richards Group, Dallas; www.rbmm.com: Jeff Barfoot (creative director/art director/designer), Chr