Viking roof color question

Tom Madden
 

I bought this assembled and detailed P2K model on eBay five or more years ago and set it aside. (The price was attractive.) It's very well done with lots of extra detail and what I'm almost certain is one of my 50' resin replacement Viking roofs. But the roof is painted silver, and I thought those NKP cars had black roofs. Was there a silver variation?

Tom Madden

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