H.Koopman Dordrecht Holland - Chess set - Koopman Dordrecht - oak wood

Beautiful, beautiful Koopman chess or checkers clock old model.. around 1950
In excellent condition... buttons etc. all present, runs fine.
Made in the Netherlands by Fa H. Koopman in Dordrecht, Netherlands.; with patent stamp 65843
The most famous clockmaker in the world; all world and European championships were played with these clocks.. also the Hoogovens chess tournament in IJmuiden, Netherlands.
The winding mechanism is in excellent condition.. no faults.
Clock is made of oak wood with glass and with a beautiful grain of the wood
White edge of the clocks
With a special indicator hand at the flag for the last 5 minutes