The bookcase designed by Mogens Koch has thus been produced continuously for more than 75 years at Rud. Rasmussen. The workshop has refined the industrial craftsmanship where the units are made of solid wood in very thin dimensions by skilled cabinet makers who use the traditional dovetail joints and rabbet joints to provide high strength and stability of each individual bookcase system.
"There was a shop in London with a shag pipe in the window display - "the World's best Pipe" – and then this silly person entered the shop and asked to see their collection. No, they had "the Worlds bestâ€¦", why there was no reason to offer anything inferior ." This is quote from Mogens Koch. Whether he meant his own bookcase system - in a figurative sense - that is not on record. But it is claimed that the bookcase is the most copied bookcase in the world - and there is probably some truth in it.