I own a Whitney Navy Revolver manufactured in 1862 that I purchased at the Chattanooga Civil War Show in Eastridge, TN. in July, 2019. I have posted pictures of it several months ago in this forum. The gun was purchased from an older fellow who stated that Whitneys were special in that they were made with iron frames. I have The Whitney Navy Revolver book by Mr. Williams and I don't believe he makes a mention of this in his research. My question then is were Whitney Navy revolvers manufactured with an iron frame, and if so, what were the advantages (if any) over a steel frame? Thanks in advance for your input.