I have a rolltop from Natl Mt. Airy — bought by my dad in the 70’s I think. It has a matching hutch on top of it, with another rolltop (tambour) in it. It was called the Presidential model, cost around $5k and weighs about 700lb.
It’s 6ft 6in high. And 5ft wide. I could fit inside my rolltop...given a good reason. If I couldn’t get out, it came with a built-in phone jack and a lamp.
I’ve seen the Presidential on ebay (I’m a sucker for antique furniture). Some with hutch, some not. Google it, it’s really stunning.
My desk is 54" wide and 51" tall and 30" deep. The first desk pictured in this thread looks a lot like it. The side panels are identical, but my drawer pulls are plain and my hutch has fewer small drawers and more slots. Otherwise it is very close to mine in appearance.
I've used it daily since I got my first flat panel computer monitor which fits well on the work surface. I almost never close my desk except to clean and dust the roll top less often than I should. When I've had a desk top computer, I put the tower on a small table right next to the desk. Presently, I have a 17" laptop on top of the desk and run a cable to the 22" flat panel monitor I'm currently using.