Here are 2 glazed metal pins for sports. The left is from Barcelona Olympics, the right is from the Masters Tournament in 1991. Sega sponsored in both of these events, & had little pins made to go with them. Even though Barcelona is in Spain, this pin was supposed to have a USA release too. They've changed the stock art to be pointing at the logo.
These are likely to be rare.
They are event-specific, and may have even been event-attend-only give away or prize items. The glaze over the art (Thick/clear) is a type of acrylic & may yellow (evidenced on right pin) with age.