The 1981 Emil Mazey Trade Unionist Windsor Ontario keychain is a collectible item that serves as a nod to Canadian history and advertising. This keychain likely held significance for supporters of trade unionism in Windsor, Ontario during the early 1980s, serving as a tangible reminder of their beliefs and efforts. Its design and production reflect the era of Victorian trade cards and merchandise, making it a unique and sought-after piece for collectors interested in advertising memorabilia from that time period.