One of the rarest of all Colt firearms. A prize for the Colt collector. Only 35 of these guns manufactured. They were said to be the special interest of Caldwell Hart Colt, Samuel Colt's son, who was an avid arms collector. It is said that most of the 35 guns produced wound up in his collection or those of his friends. Chambered for .45-70 or one of the larger variations thereof. It is an exposed hammer sidelock with double triggers. Locks, breech and furniture are case colored; barrels browned or blued. Barrels are 28" in length and checkered stock was oil-finished or varnished walnut. Barrel rib stamped with Colt name and Hartford address. Locks are also stamped "Colt". One must exercise extreme caution in dealing with this model as there have been Model 1878 shotguns converted into double rifles. Colt manufactured 35 guns from 1879-1885. Values are speculative.