Many young players today have never played with an analog clock. They are all used to the digital clock with increments (or delays). What they do not realize is this was an invention of Bobby Fischer. Here are the photos of the original digital clock which Bobby and I used to play countless games.
The photos: The kitten in front of “the Bobby Fischer Chess Clock”, one of only 3 made. He gave one to our family as a token of appreciation; Me playing Fischer Random chess with Bobby.