A pair of clear window stickers for the earlier XJ40s.  
 
Either available as self adhesive or cling vinyl.
 
The preceed the triangular XJ-S, XJ40 and X308 decals - as seen on my page banner.
 
ORIGINALS of the later triangular window decals are still available from the Coventry Foundation in the US through their Ebay shop.  (For me to manufacturer the double side printed reproductions of these is not cost effective at the moment).