I had chip charts going back to the late 60's & while formulas were provided, none showed the interior colors by way of a color chip. Any paint jobber should have a cross reference to convert your Dupont formula to whatever brand they use. Have you checked the steering column drop (where it bolts to the bottom of the dash)? Often the paint will be good enough to use as a reference in places like that when it's trash elsewhere. I assume they still used drops in '53.

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Name your dog Naked so you can walk Naked in the park.