This is a rare version of the Cubo in matted anthracite grey. Only three were ever made. It is a smaller, more compact version of the original from 1968. It was produced under supervision of Aldo van den Nieuwelaar by Boops Lighting Company just before van den Nieuwelaar's tragic death in 2010. The production stopped in 2012.
On the back it has a dimmer button to adjust the light gradually. It is in an excellent condition / as new