I am almost certain that this is a new unused fuel pump since there are no witness marks around the holes in the mounting flange where it would be bolted.
This pump was used on the Bristol Hercules radial engine and might well have been used on numerous other engines of that era
This is the only one that I now have .
I do have complete ignition harnesses for the Bristol Hercules engine as well as some other parts.
If you are searching for something else not listed phone 01692 404691