Storage Boxes in beech wood by Wim den Boon, 1967. Set of 4

A set of four solid beech wood storage boxes that were designed by the Dutch mid-century architect Wim den Boon. They were designed and made specifically for a client in Laren in the Netherlands. We have a drawing by the architect (that will be supplied with the boxes) that shows the boxes were originally designed to go underneath an in-built sofa to add extra storage space to the room. They each have wheels that enable them to be rolled around easily. They can also be stacked as shown.