https://www.jfklibrary.org/asset-viewer/archives/JFKWHP/1962/Month%2004/Day%2021/JFKWHP-1962-04-21-A
"The gold telegraph key used by President John F. Kennedy to open the 1962 Seattle World's Fair (also known as the Century 21 Exposition) sits next to a telephone on a patio table at the residence of C. Michael Paul in Palm Beach, Florida. President Kennedy delivered remarks by telephone and pressed the telegraph key to open the fair via satellite signal from Palm Beach."
In 1909, the Alaska-Yukon-Pacific Exposition in Seattle was opened (not sure exactly how) by President Taft with the same key:
"President Taft opened the fair from Washington D.C. by pressing a nugget-encrusted telegraph key. Set on a slab of Alaskan marble, the key was a gift from George Carmack, who staked the Discovery claim that started the Klondike Gold Rush. The 22 nuggets were from the first two pans of gravel he washed on Rabbit Creek, soon to be known around the world as Bonanza."
"The golden key, as it was named, was used by seven presidents over the next 60 years to open many expensive public works. Fifty-three years after being pressed by Taft, Carmack’s key was used by President Kennedy to open Century 21, the Seattle World’s Fair."
Also See:
Victor, 4X6GP Rehovot, Israel Formerly K2VCO