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Here are the official New York City CRT grades. I have seen a Florids document that has the same details.
(1) Black and white picture tubes.
Grade AA—Description—All new components and materials, including new glass envelope.
Grade A—Description—Used glass envelope, all other components and materials are new.
Grade B—Description—Used glass envelope, used phosphorescent viewing screen, used alumination, used internal conductive coating, all other components and materials are new.
Grade C—Description—Used picture tube for resale, all significant components and materials are used.
(2) Color picture tubes.
Grade AA—All new components and materials, including new glass envelope.
Grade A— Used glass envelope, new or used shadow mask, all other components and materials are new.
Grade B—New electron gun, all other components and materials are used.
Grade C—Used picture tube for resale, all significant components and materials are used.
__________________
Chris
Quote from another forum: "(Antique TV collecting) always seemed to me to be a fringe hobby that only weirdos did."
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