<P> The Main Concourse is the center of Grand Central . At 275 ft ( 84 m ) long by 120 ft ( 37 m ) wide by 125 ft ( 38 m ) high , the cavernous Main Concourse is usually filled with bustling crowds. and is often used as a meeting place . The ticket booths are here , although many now stand unused or have been repurposed since the introduction of ticket vending machines . The large American flag was hung in Grand Central Terminal a few days after the September 11 attacks on the World Trade Center . The main information booth is in the center of the concourse . The four - faced brass clock on top of the information booth , perhaps the most recognizable icon of Grand Central , was designed by Henry Edward Bedford and cast in Waterbury , Connecticut . Each of the four clock faces is made from opalescent glass ( now often called opal glass or milk glass ) , though urban legend has it that the faces are made of opal and that Sotheby 's and Christie 's have estimated their value to be between $ 10 million and $ 20 million . A 1954 New York Times article on the restoration of the clock notes that `` Each of the glass faces was twenty - four inches in diameter ... '' Within the marble and brass pagoda lies a `` secret '' door that conceals a spiral staircase leading to the lower - level information booth . </P>
<P> The Main Concourse is the center of Grand Central . At 275 ft ( 84 m ) long by 120 ft ( 37 m ) wide by 125 ft ( 38 m ) high , the cavernous Main Concourse is usually filled with bustling crowds. and is often used as a meeting place . The ticket booths are here , although many now stand unused or have been repurposed since the introduction of ticket vending machines . The large American flag was hung in Grand Central Terminal a few days after the September 11 attacks on the World Trade Center . The main information booth is in the center of the concourse . The four - faced brass clock on top of the information booth , perhaps the most recognizable icon of Grand Central , was designed by Henry Edward Bedford and cast in Waterbury , Connecticut . Each of the four clock faces is made from opalescent glass ( now often called opal glass or milk glass ) , though urban legend has it that the faces are made of opal and that Sotheby 's and Christie 's have estimated their value to be between $ 10 million and $ 20 million . A 1954 New York Times article on the restoration of the clock notes that `` Each of the glass faces was twenty - four inches in diameter ... '' Within the marble and brass pagoda lies a `` secret '' door that conceals a spiral staircase leading to the lower - level information booth . </P>
who made the clock in grand central station
who made the clock in grand central station
Henry Edward Bedford
Henry Edward Bedford