This is my car, so I can answer the questions that Doodle has raised.
The issue of the mix and match pre facelift and facelift parts has been raised before. You have to bear in mind the car is ex Brunei Royal Family and as such it can't be compared to a showroom model. The family ordered all sorts of wierd and wonderful creations that have never been seen before. What I can say, is that the car arrived from Brunei in this exact format. No parts have been changed or updated to alter the look of the car.
I have a feeling part of the explanation may be that its the very 1st SL73. The Sultan was AMG's biggest customer, so I would expect him to be first in line for everything. Certainly, I've not seen an earlier car, though there may be a few tucked away in Brunei!
It was a classic Brunei car that needed a lot of recommisioning. I've tried to stay true to the originality, but there were some items (such as paint) that had to be addressed.
Good spot re the grille. The original one was damaged and a used part was sourced. At the time I couldn't find a new part. Again, its the same part number as the original.
Exhaust is genuine AMG and as per how the car was delivered to the UK. Certainly there is no Eisenmann text on it.
True re the number plate plinth. I hate front plates so did not install it.
The ducktail had to be replaced as the original had perished beyond repair. I'll get the fitment of it looked at.
The wood veneer is personal preference. I do understand many would disagree with my choice though.
I haven't used the windbreaker or tried to install it. Again it came with the car. The Auction photographer who has his own R129 said something similar, so it may be that there was a mix up in Brunei and one of the other 100's of R129's in the collection has the one from this car. I assume the correct one is available to buy, in which case its a simple fix.
Re the VIN on the paperwork, another good spot! The chap In Singapore who helped me import the car to the UK made an error. He was also exporting a Brunei Aston Martin V550 Vantage at the same time and mixed the two up. All the other paperwork shows the correct info.
Lastly, no curry hooks or folding mirrors