Trevor...when I was doing the wiring on my '63 Midget, I bought a Moss harness - the correct replacement for mine....it came packaged in a bag inside a bag...the inside bag was from the factory in the UK, the outside bag was Moss'....I had a question about a white wire so I contacted Moss & had them research my question....while they were doing their research, I called British Wiring & had them pull a harness off the shelf & read me the factory part number on it - same as Moss!
At the same time, I ordered a harness from VB, knowing I would probably return it but just in case I needed it...when it arrived (before I sent it back), I opened the package - a VB tag & Moss tag on the outside bag with factory bag inside! VB got their harness from Moss!
I talked with the factory about my question & they confirmed the number on the bag was, in fact, their number for a '63 Midget harness.
So, I'm wondering how there could be variations in harnesses that all come from the same factory?
Oh, the answer to my question was that the factory does not build a separate harness for Midgets with pull handle starters; so, the extra white wire for later starters has to be cut off where it exits the harness.