Dominic the only thing that joins most of the people on this forum is a love of the Mark.
An update........
I have taken some more photos, now that I have cleaned up the rear side
the three clips are still in place - although they appear to have been removed, and caused some minor damage to the rear which appears to be quite usual from picture of original cobras.
this can be shown by illuminating the rear side.
hopefully this adds to the possibility of it being a 1960s part ??
