Am I the only one who realized that the strategy guide got the mask wrong?

I mean it saysin the guide that the mask should give +50 Heavy Armor. Hel, the mask translates to Brutality in dragonspeech. Instead we get immunity to poison and disease, come on Bethesda, I called on this after the Midnight release

it doesnt give +50 heavy armor, it probably has 50 armor rating...

I know its effects, im sayin the strategy guide has it as giving +50 heavy armor effect