I believe it shipped in early 1954. Technically, it is factory nickel but it was refinished [R-N] by the factory in 1983 [1 1 83]. The B on the lower part of the grip frame likely means it left the factory originally in blue.
Based on others that bracket yours in the database, I'd suggest Smith & Wesson shipped yours in or around February 1954.
We need a better shot of the left side of the grip frame. None of my two dozen blued 1950s-vintage Chiefs Specials have a B to indicate they were to receive a blue finish at the factory. Here are photos of a five-screw Chiefs Special that shipped in September 1952 with a factory nickel finish. The expected three N stamps clearly indicate its original finish was nickel.