The clock's face is nearly 20 feet in diameter. There's actually 4 faces, one on each side of the tower. The minute hands are a bit over nine feet long, the hour hands about six and a half feet long. They were originally redwood and have been redone in aluminum.
Wrigley's south tower is 30 stories tall; the north tower is 21 stories in height. The building has a quarter million glazed terra cotta tiles on its exterior. Each of the tiles is individually identified and tracked in a maintenance database.
When the Wrigley Building was begun, north Michigan Avenue was known as Pine Street. Wrigley was Chicago's first air conditioned office building.
Now you know.
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