Perhaps you might find this interesting?.
At one particular time Grundig had a very high failure rate on the Toshiba CRT's fitted in a particular 20 inch model.
Following an extensive investigation it turned out that the guns were stored in a room at the factory, and that room (like most) had a suspended tile ceiling.
The outer roof of the factory developed a leak, and it rained in, and water settled on the ceiling tiles of the room containing the electron guns. This increased the humidity in the room, and contaminated the electron guns. When the CRT's were manufactured they initially worked perfectly fine, but after about 6-9 months there were massive low emission failures. The sets were still under warranty, and Grundig replaced the CRT's - and I presume Toshiba covered the cost?. A few did manage to last past the 12 month warranty, but fairly obviously Grundig covered any of those that fell within the faulty serial number range.
There was mention above of 32 inch CRT's, there were obviously also 36 inch ones - plus Toshiba made a 39 inch 4:3 CRT, and we sold a number of such models from Grundig - they were seriously heavy, and came with detachable metal handles at each side so you could carry them (two man lift - and two STRONG men at that). Never had occasion to smash one of those CRT's, I bet they would have gone with a good bang