“The World’s Columbian Exposition” was the title of the 1893 Chicago Illinois World’s Fair. .776″ high x .601″ wide. Bronze. Nickel plated finish. Brass key, nickel plated finish.”1893″ is stamped on the obverse of the body. The reverse of the lock is blank. A crab style dog collar padlock. This was a promotional item at the worlds fair.Patent # 100402.