of 12 different nations. Every hour on the hour the dioramas opened up and music was played. The clock is now located at the Rochester Airport. The oldest continuously running clock in the United States is located in Winnsboro, South Carolina, and dates all the way back to 1837. Hertzberg Clock (San Antonio), Texas Department of Defense master clock, at United States Naval Observatory, Washington, D.C. Delacorte Clock, Central Park, New York City Baxter Clock, New Bern, North Carolina, NRHP-listed Copake Memorial Clock, Copake, NY, NRHP-listed Old Clock at Zion's First National Bank, Salt Lake City, UT, NRHP-listed The digital countdown clock at the Press Site-Clock and Flag Pole, Kennedy Space Center, Florida, NRHP-listed Sidewalk Clock at 161-11 Jamaica Avenue, New York, NY, NRHP-listed Sidewalk Clock at 200 5th Avenue, Manhattan, New York, NY, NRHP-listed Sidewalk Clock at 519 3rd Avenue, Manhattan, New York, NY, NRHP-listed Sidewalk Clock at 522 5th Avenue, Manhattan, New York, NY, NRHP-listed Sidewalk Clock at 783 5th Avenue, Manhattan, New York, NY, in front of The Sherry-Netherland, NRHP-listed Sidewalk Clock at 1501 3rd Avenue, Manhattan, New York, NY, NRHP-listed Snow Fountain and Clock, Brockton, Massachusetts, NRHP-listed Shot Clock Monument, Syracuse, New York Oceania Australia Nylex Clock, Cremorne, Victoria Royal Clock, Queen Victoria Building, Sydney Other The Doomsday Clock by Bulletin of the Atomic Scientists, which symbolizes man's current risk of nuclear war Experimental Talking Clock, long thought to be the world's oldest playable sound recording See also List of largest clock faces List of largest cuckoo clocks List of clock towers List of tallest clock towers References