A reproduction decal of the Jaguar 6 cylinder 4.0 Cam cover sticker, part number EBC 3888.  These are sadly no longer available from Jaguar....however...read below.
 
While I do not wish to talk myself out of a sale I have noticed that SNG Barratt have originals of this decals listed.  I would always fit and original decal if I could so it you feel the extra cost is worth it then please feel free to follow the link below.  
 
https://www.sngbarratt.com/English/UK/parts/efdc2f88-9f34-4b27-91e3-778d0e4b370f