Commemorative Keychain with "Grand Opening 125 Norridge" Building Medallion

This item is a commemorative keychain featuring a distinct circular medallion. The overall construction consists of a bright gold-tone metal split key ring attached to a short, approximately 1-inch (2.5 cm) linked chain, which then connects to the top of the medallion. The medallion itself is made of a base metal, possibly brass or copper, or plated to achieve a warm, coppery-bronze tone, showing a natural patina and some minor surface wear consistent with age and handling. It is circular in shape, appearing to be about 1.5 to 2 inches (3.8 - 5 cm) in diameter, comparable to a large coin. The front (obverse) of the medallion is intricately engraved. At the top, slightly curved, the words "Grand Opening" are prominently displayed in a stylized font. Below this, a detailed architectural rendering of a multi-story building is depicted, featuring numerous windows and what appears to be a structured facade, possibly a commercial establishment, public building, or a historical landmark. Below the building image, two lines of text are engraved: "125" on the upper line, and "NORRIDGE" on the lower line. This combination strongly suggests the medallion commemorates the grand opening of a specific building or establishment in the location of "Norridge" (likely Norridge, Illinois), possibly celebrating an anniversary or marking a building number ("125"). The general condition suggests typical wear for a functional keychain, including minor surface scratches and a dulling of the finish, particularly on the medallion, which exhibits a subtle darker patina in recessed areas, highlighting its age. The gold-tone elements (keyring and chain) retain much of their luster but may show microscopic abrasions. No significant damage such as dents, deep gouges, or broken links are evident. This piece likely dates from the late 20th century, given the style of the engraving and the common practice of issuing such commemorative items for significant local events. The craftsmanship is competent for a mass-produced commemorative item, with clear delineation of the engraved details.