A traditional chess clock design in a transparent blue using quality wind-up mechanisms with red flag time indicators - perfect for beginners and schools. This clock is made in Europe and is based on the traditional chess clock design, using quality transparent blue plastic rather than wood. The red flag closest to the top of the clock indicates when a player is in the final moments of a game, which is gradually lifted by the hand; as soon as this flag drops, the player's time is officially up. Wind-up Mechanism - No Batteries Required