Hey I checked out the link; those were pretty cool! I was fascinated by the MW radio that calibrated in wavelength. You never hear of that but wavelength has a simple inverse relationship with frequency, and there's no reason why you couldn't do it.
Great Photos, thank you for sharing. It was interesting to see how the radio models evolved in just a few short years, and that Zenith played a large role. From a collectors standpoint, is there any particular model that is very sought after?