That was the original Vanguard, which exploded on the launch pad on December 6, 1957 and was dubbed "Kaputnik."
Dad brought TV-3 home after the explosion. It sat in our house overnight and was displayed in the National AIr and Space Museum for many years. I’m not sure if it will be displayed in the remodeled Museum. Dad tinkered with Vanguard 1 on our dining room table. He then invented the Naval Space Surveillance System, Timation and GPS.