The picture below shows four larger views of this 1964 – 1965 New York World's Fair Unisphere Advertising Souvenir Ring. The slver colored metal ring is not dated but it is from 1964 or 1965. It is not marked and the maker is unknown. The ring is adjustable. It measures about 5/8'' tall. It appears to be in good condition as pictured, but it could use a cleaning.