[Carmine]

Gentlemen,

Understand that I see a multitude of reasons why Zenith didn't make a color porthole (or any color set for the public until the '62 MY).

My comment was only meant to provoke the thought that Zenith engineers would have been working on a color rectangular tube concurrently with the company marketing the "superiority" of its porthole B&W sets.

It makes you wonder if there was ever a discussion of producing a color porthole in the very early stages of color development at Zenith, circa 1949-51. The cons would outweigh the pros, but I could picture an argument being made by the "porthole camp". While I understand they were building color wheel sets at that time, they must have also been working on electronic color to be ready with their own tube in 1953.