> Sony’s part number suggests it has a 45 inch tube inside. But in a rare case of truth in advertising, Sony advertised it as a 43-inch model.
The overall tube size is 45”, the actual screen size is 43”. I believe it was mandatory in the USA to market TVs based on screen size, in most of the rest of the world they were sold based on tube size.
That’s why common sizes of 4:3 CRT TV in the US were 13/20/24/27/32” whereas in the rest of the world the same size TVs were sold as 14/21/25/29/34”. Interestingly the tubes’ internal part numbers are based on the screen size in centimeters: 34/51/59/68/80 cm.