Yes, the general public wouldn't have a clue, but the auction houses & many astute dealers certainly would.
Red Book specifically lists it an "HBD canopy option" which it is & plated as such. As you well know, it's not a bolt-on accessory & they know that.
The other point of course is that Red Book only records licensed dealer transactions (auctions & car yards) so private retail sales are not factored in. This probably leads to the low figures recorded.
Dr Terry
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