The 5600 series is a modular system that allowed people to compose and assemble their own cabinet. This sideboard is part of this series and does have some rare options, such as the dark grey top shelves. The height and size make it highly attractive and rare. The more common compositions are higher cabinets. This sideboard is a great item for a house that needs a touch of industrial design. The design is from the early 1960's, as is this cabinet from the first owner. Due to use and age it does have some patin to it. Overall in a very good condition.