Oh no not my amazon.
Quite surprising then.
"Dispatched from and sold by Amazon"
Who did you buy it from though?
I got these when they was about the same price through the same amazon listing... and got a fake one (based on the cable spring). Returned, and was sent a genuine one on the second time. No idea what that is about, but plenty of guides online, and to be safe, you can submit a ticket to Marshall via their site withe the S/N and they can tell you if it is fake or not. No issues with returns for me A PITA, but worth it - great headphones (y)