This steam and motor driven clock was installed in 1977.br/ quot;The clock displays the time on four faces and announces the quarter hours with a whistle chime that plays the Westminster Quarters. The clock produces a puff of steam from its top on the hour.quot; (From Wikipedia)br/ There are four plaques on the base of the clock just as the clock has four faces. You can read the plaques at this site:br/ br/ a href="http://readtheplaque.com/plaque/steam-clock"; target="_blank"http://readtheplaque.com/plaque/steam-clock/a