Thanks for the comments! Wow !
I got a few more pictures this afternoon...Right now NONE of my sets can be assumed to be in working condition, as I have been away from the hobby for several years, so no screenshots yet!
As you can see from the shot of the corner of the tube, it is not impressively rectangular, but it ain't round either!
According to Peter A. Keller "The Cathode-Ray Tube Technology, History, and Applications":
"The first commercially available rectangular color tube was the 22-inch, all-glass 22EP22 (fig 6.22) developed by Westinghouse Electric Company in their Elmira, New York, plant (1956) A 24-hour-long pump cycle combined with a high-temperature bake (400 degrees) resulted in a very good vacuum and long life. The 22EP22 was used in a television receiver manufactured by Westinghouse, but economics doomed it after only a year of limited production."
As I understand it, when the switch was made to a commercial 21" round tube, the 22" sets were sold off cheap to Westinghouse employees (100-200$) with the understanding that replacement crts would not be available! This one got hauled to Oregon, when the Westinghouse engineer changed jobs... I got it when he moved again in the mid 80s. Free!
jr