Take a look at the bottom of this page, the picture with the caption "Student Benefactor Philip T. Di Pace, of Albany, N. Y., contributes used radio and television chassis"

http://www.rfcafe.com/references/radio-electronics/tv-technicians-win-ge-awards-february-1958-radio-electronics.htm

Is that some type of early color CRT or just a metal cone B&W with a mask attached.
It doesn't look like a 15GP22 and I can't think of any B&W sets that had the mask attached to the CRT like that.

Looks like a 16 or 19 inch metal cone B/W CRT with a Motorola mask.

Looks like a 16 or 19 inch metal cone B/W CRT with a Motorola mask.

I would tend to agree. Not a color CRT. It's kind of strange that as a kid I only had one metal tube set, a Motorola with a 16G. I just took what was given, or what was on the street on trash day LOL.
Kevin

Yes it is color. There were several experimental color tubes. Here is one:

http://www.earlytelevision.org/rca_developmental.html