Very interesting Hugh. I would guess that these detail pages vary according to the year of manufacture. The transmission sheet appears to have the gear serial numbers, so they went into some detail where it was available.
I have collected several hundred COA`s and the details on them vary a lot. In the UK PCGB seems to provide additional detail such as selling dealer or distributor even for US delivery; I have not seen PCNA provide this. It almost appears that different national distributors work from different data sets.