Vintage H. Koopman Dordrecht Chess Clock – Rare 1960 Mechanical Tournament Timer

Up for sale is a stunning piece of mid-century chess history: an original H. Koopman Dordrecht mechanical chess clock, manufactured in the Netherlands circa 1960. Famed for their uncompromising reliability, Koopman clocks were widely regarded as the gold standard for high-level European chess events and Olympiad tournaments throughout the mid-to-late 20th century. This specific model proudly features Patent No. 65843 stamped on the unit, highlighting the proprietary, highly responsive red-flag mechanism and precise time-switching lever system that defined Koopman's engineering excellence. Design & Build: Casing: Robust, handcrafted solid wood frame (beech/oak) featuring a beautiful, warm mid-century grain and original finish. Buttons: Classic top-press wooden/metal plunger buttons with smooth, fluid seesaw action dials: Dual analogue clock faces boasting crisp, clear numbers, paper backing, and distinct red flag indicators to catch the exact moment a player's time expires. Features: • Mid-Century Modern Condition: Pre-Owned Good Great Condition. Both clocks work as should. Box is original but taped to ensure stability. Please look at pictures to access condition also.