How does a mechanical chess clock work?

I have a Garde Mechanical Chess clock w/ no instructions. I can turn the knobs on the back for operation but how does it work in a chess match? What do the red levers (under the glass) mean in the front?


Thanks|||If you are going to play a game where each player has 5 minutes then set the minute hand on each clock to the "11" (five minutes until the top of the hour), but you must rotate the minute hands around clockwise in order for them to drag across the "levers" properly when the time is up. The "levers" are pushed upward as the minute hand approaches the "12" and they drop back downward when your time is up. It's just a visual aid eliminating guesswork as to when your time is precisely up. It doesn't matter where the hour hand is for speed games. But if you want to limit your game to 1 hour for each player, then each clock should be set to 11 O'clock so that the game will end in the "midnight" position. To keep the clocks from ticking off prematurely, just push the button over one clock halfway until neither clock ticks.





Good luck! I hope this helps.|||I'm guessing its a standard analog clock.





After winding it up or adding batteries push the button over one clock. It should stop and the other go. After a few seconds push the button over the other clock face. It should stop and the other clock should start running.





Gently push on both buttons to make them both stop running.





You can use google to look up Garde.