Jaguar XJ40 XJS Speedo drive Speedometer Sensor 86-92 models. Missing plug. As can be seen clearly on the pics, a past owner had cut the plug off the cable, which is missing. So this will need adding on from your existing failed sensor. 
obviously this is very much a compromise solution, when of course everyone would like an intact part. But due do the high demand for this part, I am making this part available “as is” requiring the minor repair as above, to make it fully functional. 

used condition, bench tested with good continuity between  the red and blue cables. 

Suitable for 86-89 model year XJ40 up to VIN 667827.

This part is DBC6296/ DBC3093.

It can be compatible with DBC2632- This can potentially be adapted for use on XJS too, as the sensor and plug is the same, but the cable length may require adjustment though. Very much a best compromise if the original XJS part cannot be sourced.