Quadrondo dining table from the 1980s, designed by Erwin Nagel for Rosenthal. The table is solidly built, featuring a round base and a black and white-stained ash veneer top with a beautiful visible wood grain. What makes this design special is its clever mechanism: with a single sliding motion underneath the table, the round top unfolds into four sections, transforming it into a square dining table. A fine example of functional design with clean, geometric lines. The table is in very good vintage condition with minimal signs of wear.