Welcome to the forum.
I can't say I've found anything on your pistol but it isn't uncommon for companies to produce limited issues of the guns they sell with historic names on them.
As for the Buffalo Soldiers I'm sure you've already found links such as these:
http://en.wikipedia.org/wiki/Buffalo_Soldier
http://www.buffalosoldiers-amwest.org/history.htm
Noting that the Buffalo Soldiers units were formed in 1866 following the end of the Civil War does not rule out their use of the Colt 1860 Army revolver.
The Colt 1860 Army was the most common revolver used by the North during the war, some 156000 being produced during those war years.
The pistol continued to be produced up until 1873 when it was replaced by the Colt Single Action Army cartridge revolver.
As for the 049, check the serial number. The last two digits may be 049.
If the number 049 is not part of the serial number, most likely the number represents the 49th gun of some limited series of "Buffalo Soldier" pistols.
As for collect-ability values, although there are a few people who do collect reproduction cap & ball revolvers they are few and far between.
This essentially means the value of your gun is unlikely to be much greater than any other Lyman cap & ball pistol to the majority of the people who are interested in buying one.
