The extensive stainless steel trim on these Imperials is flash chrome plated. A fact I came to understand and had verified yesterday. I presume the 1956 Imperials were also done. This goes along with the 1955 Chrysler C300 and 1956 300B on which the minimalist SS trim was also flash chromed.
If you aren't familiar with the 1955 Imperials, part of what is special about them is the body line side trim of these cars from front to back is all triple chromed pot metal. For '56 model costs were cut with stamped SS trim.
From a FB page I learned that the 1955 Imperials were called, in the auto show press package, "Custom Imperials". I think that is a single year label. My sedan is a "1955 Custom Imperial Formal Sedan by Derham".
The lighter colored cloth used in the Custom Sedans only is a boucle and the no-flash picture shows the texture well.
Going through the extensive receipts for service, etc. with the car, the odometer mileage of 66,xxx is correct.