I like to see a picture of an original and go from there, and needless to say, original boxes for Dragoons etc are a bit hen's teeth. I could improvise as with the Schofield and Merwin, but I need to find a decent pen and ink or line drawing of the relevant pistol to give it and credibility. The Schofield and Merwin were best guess based on what I've found for colt with regards box style.