https://www.ebay.co.uk/itm/Jaguar-XK-XK ... SwJ5pd3tZX
It is an original, new & unused Jaguar internal door mirror cover with tweeter grille for left-hand (UK passenger) side of car. These retail for over £170 new!!
I believe this fits 2007 - 2015 XK & XKR, but please make sure this item is suitable for your vehicle before purchasing. I purchased it for a 2007 XKR but never got round to fitting it before selling the car.
Steve