Excerpt from Dennis Adler's book, Second Edition Blue Book of Modern Black Powder Values, published by Blue Book Publications.
"They were all hand-fitted. There was no way to do mass production," explains Imperato. "We had the barrels, cylinders and backstraps cast in Italy (as Forgett had done), but we finished them off in-house. We made the frames, the center pins, nipples, all of the screws, springs, and built every F Series gun at Iver Johnson Arms. We even used the old style color-case hardening method with the charcoal and bone meal, and Colt's exclusive Colt Blue Finish. They turned out pretty good. In fact, I think our finishes were actually better than Colt's single actions being done in Hartford."