you won't find it listed anywhere as it was one part of a deluxe trim package that would have been included if the truck the package was for was a fleetside, and it was a one year thing - all the books like assembly manuals are reprints of the 55 manual - would need a 'salesmans accessory options listing' kind of book from the 59 model year to show it, where the RPO number would be for the deluxe trim package on any TF pickup [chrome bumper, headlite rings, hubcaps, and cab-window trim + some interior stuff]
Bill
