Were Hickok’s 1851 Navy Colts plated?

As the historical interpreter for the Buckhorn Saloon & Museum in San Antonio, I portray Wild Bill Hickok for the visitors. Were his 1851 Navy Colts silver plated? Col. T. B. Reinhardt Canyon Lake, Texas   Hickok biographer Joseph G. Rosa says, “Circa 1866, Hickok replaced his standard Navies, that is with walnut stocks, for a pair of plain (not engraved) 1851 Navies that were blued and case hardened, as per normal, but had ivory grips. The mountings—that is the trigger guard and bac