Sorry, Hawg, but no. We can get fooled by pictures because the 1851 Navy is almost a perfect scale-up of the 1849 Pocket model, and the long barrel tends to fool the eye as it is uncommon on the 1849.
But aside from subtle differences, the stagecoach holdup scene on the cylinder instead of the naval battle scene makes it clear that the gun is an 1849 model, 31 caliber, made in 1854.
(BTW, that marking was not really engraved in the usual sense; it was made by rolling the cylinder under pressure on a steel plate with the scene on it in reverse.)
While the 1849 is the most common Colt percussion revolver, they are now becoming fairly valuable. That one seems to be in quite good condition, with traces of silver on the grip and a good cylinder scene; I would put it in the $1200-1500 category.
Jim