Accordig to Wikipedia:
Characteristics:
There were few variations of the Model 1861 Navy Colt. Approximately 100 of the first guns made had fluted cylinders with no cylinder scene. Another 100, made between the serial ranges of 11,000 and 14,000 were cut for a shoulder stock ? the lower portion of the recoil shield was milled away and a fourth screw for the stock was added to the frame. With the exception of the first fifty or so of this model, all guns had a capping groove. A brass trigger guard and back strap, silver-plated, were standard. The cylinders of the Navy 1851 and 1861 Navy Colt revolvers are engraved with a scene of the victory of the Second Texas Navy at the Battle of Campeche on May 16, 1843. The engraving was provided by Waterman Ormsby.
Total production between 1861 and 1873 was only 38,000
Fingers (Show Me MO smoke) McGee