I like the styling of the old NAD systems. It's something you don't often see any more, even in current NAD product.
The inspiration is Dieter Rams' work for Braun rather than American hi-fi, and if it doesn't look vintage it's because Rams' designs are timeless. The Braun examples below are from the early 60s and late 60s, respectively, but neither would look like throwbacks if you put 'em in stores today:
Braun RT-20 triband radio
Braun tuner (don't know the model number)
Wow, I just notice the harmonic design of NAD after you pointed out. They really pay attention to details even though they don't have metal knobs.
Those Braun look stunning! Is Braun the same company which made ADS speakers? Their Braun speakers are superb too!!!