The first Colt revolver to be made in large numbers was the Model 1849 in 31 caliber. Around 325,000 were marked as made in New York or Hartford between 1850 and 1873, and another 11,000 marked as made in London, England. It is the gun credited with saving Colt. More of this model were made then any other Colt revolver in the 19th century. It had a five or six shot cylinder with barrels in lengths of 3", 4", 5" and 6". Some of these pocket models had cylinders engraved with a scene of a stagecoach holdup.
Sometimes called the Baby Dragoon as a reduced version of the massive Walker and Dragoon revolvers made before it.
At any rate...here she is, a version made by Uberti. I managed to gather up a bag mold that cast both ball and conicals for it, along with a small powder charger. It is a small gun for the first half of the 1800's..