19th Century paltrok saw windmill at de Zaanse Schans.
Paltrok mills are distinctively different to other windmill types. They have a three-sided open work floor, often a dark fašade and to turn the sails into the wind the whole body of the mill is rotated with the aid of a great ring of rollers built on a brick base. Other mills have a stationary body and only the cap rotates to turn the sails.
Can be visited.
Windmill 'de Gekroonde Poelenburg' @ Zaanse Schans