Your gun is a colt "New Army", made in 1903. It's is sort of an upgraded version of the model 1889, which lacked a cylinder bolt and bolt lock notches on the cylinder. It is commonly called the model 1892, but went through a series of lock work upgrades in in 1894, 1895, 1896, 1901 and 1903, and is sometimes referred to by those model numbers. The US army used this revolver, in 38 colt, until 1909. The 41 colt model was for the civilian market.I love these old Revolvers, they are some of my favourite guns ever made. That being said, they are not very popular, parts are very rare, and gunsmiths who will work on them are even rarer. Sorry to say, they generally sell for very little. I've almost never seen a refinished 1892 sell for more than $300 on gunbroker. I have several, and have never paid more than $175 for mine. A way undervalued piece, in my opinion.