17th Anniversary of June 17, 1986 opening. Pin has quite a bit in its design. The logo is a ferris wheel (from Navy Pier), and over it is the City Skyline, with musical instruments integrated into the design. Reverse has new logo/musical grid, & hologram. Painted style. 5 lines print. Logo - Musical Theme - Guitars Drums Logos etc Pattern. This pin was sold through retail and/or online. Base Material is Gold Appearance