Vodder sideboard verification  

With the seven drawers it looks more like the 63 model.

Not exactly sure about Sibast, but Hundevad and other manufacturers offered case pieces with connections for both leg and plinth options.

I would expect that if you looked on the underside of this piece, you would see threaded holes for both options.

If it is Sibast, then it would be Vodder. And it is Sibast it is highly likely to be marked.

yes, most likely the 63 model. It was advertised several times in period magazines, but never came across a version with no legs.