Why do some model names use "MKII"?


Ok I am going to show my ignorance here. It seems very common for an amplifier to have a model name with a MKII reference. It seems to designate either an upgrade or a special version of a previous model. Can anyone educate me as to the origin of this nomenclature? I am guessing it is a tribute to a classic guitar amp, but I'd love to know for sure.
waz664
It is just an abbreviation for the words Mark Two, (meaning version number two). To be honest, I don't think it has anything to do with guitars at all, but merely standard production nomenclature.

My two cents worth anyway.
It generally means that the manufacture didn't get it right the first time :-)
Or happy MKI owners will have a chance to be happier, where they might otherwise just stick with what they already have.