That's not a Durst commercial enlarger at all, but something from their separate amateur division. There are a number of L-series 4x5 bench enlargers in use in the US; I was once offered one for free, but didn't have space for yet another enlarger. Here most such anodized aluminum bench enlargers are Omega, Beseler, and Saunders brand instead - all good quality items, but not built anywhere near to the standards of real commercial or industrial enlargers. With one rare exception, the smallest commercial Dursts were 5x7 inch film capacity, on a 138 chassis. L184 10X10 units were also common; but their industrial enlargers were made clear up to 12X16 inch film size (I've never seen one of those either). I use both L138 5X7 and L184 10X10 floor standing models; most of the components are either machined or diecast. It would be prohibitively expensive to still manufacture such things that way today.
It's a durst laborator 1200. I never mentioned anything about commercial.

