From what i remember the Panther Solo ones did not have Ford written on them, BBR bought the last of them from Cosworth, I saw them all lined up there years ago.

Maybe meant to go on one of the tall block exchange engines, or it could well be from a proto engine meant for another model but never used. They did try them in Granadas and other models under evaluation.

I have a new dry sump version with no oil filler hole at all in it, there were a number of non road car cam cover options made over the years by cosworth