I have that same fluted 3rd Model Dragoon. There were three separate varieties of 3rd Model Dragoon issued by Colt under the Signature Series.
It's a big, beautiful hunka iron.
Love that Colt Blue!
Here it is next to a fluted 1860 Army, for scale.
o "The Earth is degenerating today. Bribery and corruption abound. Children no longer obey their parents, every man wants to write a book, and it is evident that the end of the world is fast approaching." Assyrian tablet, c. 2800 BC
o "In the beginning of a change, the patriot is a scarce man brave, hated, and scorned. When his cause succeeds, however, the timid join him, for then it costs nothing to be a patriot." Mark Twain
o "They have gun control in Cuba. They have universal health care in Cuba. So why do they want to come here?" Paul Harvey
o TODAY WE CARVE OUT OUR OWN OMENS! Leonidas, Thermopylae, 480 BC