[old_tv_nut]

Regarding shipping color CRTs. Delta-gun color CRTs were designed with built in compensation for the average vertical component of the Earth's magnetic field, which is opposite polarity in the northern ans southern hemispheres. In one case where an Australian TV maker used CRTs imported from the northern hemisphere in some models, the CRTs were mounted upside down to get the best color purity.

[Edit: The more I thinnk about it, the more I think this applies to in-line gun, stripe phosphor tubes too. Vertical magnetic field would bend the beams left or right. I do know the upside down mounting story is true,]