I was struck by the cover too: 2 senior men in the forground, looking like they have something to do with the company for sure. Notice the two handsome, model-like young men in the background, around the Sequoia.
The Penthouse is interesting to me for several reasons. The gill-adjuster, 1 central vent with a long handle, became standard later on. I have a 14" with that, conventional in every other way. Mine does not have the ash-catcher, although I've seen that feature on conventional wheeled tripod models. Mine came with the clamps, resembling hose clamps, to hold the ash tray, which on my 22" is a flat-bottomed pan resembling a 49'er's gold-mining pan, not the deep wok-like affair shown in this catalogue. Many I've seen, in every size, have those hooked cut-outs on the circumference of the pan to hold it to the legs beneath the vents. I'm guessing that was the earlier form but don't know.
I'm also interested in the Penthouse's "deep dome." It resembles the one on a Smoky Mountain, although the SM's can't be used with a 14" grill despite the matching diameter because both dome and kettle on the Smoky Mountain are male, with the flanges for both top and bottom section joints being on the parallel-sided riser mid-section--you could enable these substitutions by fabricating a flange piece. You could also use that piece to make a deep grill from the smoky mountain's top and bottom sections. The fireplace grill would be easy with existing components: bottom of Smoky mountain, top of 14" grill, except for no flanges or brackets to hold the food grill up; you'd have to make them.
The Penthouse promotional shot shows a turkey, an obvious candidate for a deep dome. I've always assumed the flatter conventional dome--a shape replicated in every size down to the Smoky Joe--is derived from the shape of the original buoy, as it would tend to make it float rightside up were the two pieces welded tight together, but I really don't know.